External Reliability Research Articles

Age and Job Satisfaction among Public Secondary School Teachers in Nakuru County, Kenya

Teacher job satisfaction has in the recent past raised concerns among researchers and practitioners in Kenya. This concern has been occasioned by industrial disharmony in the teaching profession by way of teachers’ strikes including dissatisfaction related behaviours among teachers such as absenteeism and desertion of duty. This is what informed the study whose core objective was to investigate the level of job satisfaction among secondary school teachers in Nakuru County-Kenya and the extent to which age differences existed in job satisfaction among the teachers. Data were collected through a self-delivered questionnaire from 341 teachers who were randomly selected from 3,092 teachers in the county. The instrument was validated through a pilot study while its internal and external reliability was estimated through Cronbach’s alpha (r= .945) and split-half (r= .905) techniques. Collected data was analyzed usingANOVA statistic. The study revealed that job satisfaction increased with teachers’ age and that the age-job satisfaction gap was statistically significant (p=.000). The findings also demonstrated that the significant job satisfaction differences were between teachers below 30 years of age and their 30 years and above counterparts. Drawing on these findings, it is imperative for the national teacher management entity, specifically the Teachers Service Commission (TSC) to borrow a leaf from the recommendations of this study with a view to enhancing job satisfaction among the newly recruited teachers. Similarly, secondary schools Boards of Management (BoMs) need to implement these recommendations in their schools so as to improve job satisfaction among newly posted teachers in their schools. This will undoubtedly enhance their performance to the benefit of the students.

Perceived benefits of retrofitted residential secondary glazing: an exploratory Australian study

PurposeRetrofitting single glazing with double glazing saves energy and enhances indoor comfort, however replacement can be expensive. Secondary glazing is an easier-to-install, cost-effective retrofit alternative. There is a gap in the literature about post-retrofit occupant satisfaction with secondary glazed windows in Australia.Design/methodology/approachThis research addresses this gap, with an online survey completed by 56 respondents in New South Wales and the Australian Capital Territory who retrofitted secondary glazing. This research seeks a deeper understanding of occupier views. Issues of validity and internal and external reliability were addressed in the research.FindingsStrong satisfaction and significant improvement in indoor comfort was found. Over 80% of respondents felt their home had better thermal and noise insulation. Nearly 79% found a positive impact on their property value and 77% would retrofit secondary glazing if they moved. Occupants considered secondary glazing a suitable technical, economic and environmental alternative to double glazing in retrofits.Research limitations/implicationsThere is a chance of sampling bias; only satisfied respondents answer the survey. Survey data was collected from occupants located in a small geographic area and who used the same manufacturer. Different climatic conditions, varying specifications and quality of installed systems could influence perceptions.Practical implicationsMany reported health and wellbeing improvements, higher comfort, higher property value and willingness to invest in residential energy efficiency measures. These findings need to be more widely known in the Australian market.Originality/valueFew studies focus on retrofitting secondary glazing to Australian residential buildings. This study highlights the social, economic and environmental benefits perceived by occupants post-retrofit.

La comunicación estratégica institucional para el posicionamiento de la imagen a través de las relaciones públicas

La presente investigación se realizó con el objetivo de identificar los elementos fundamentales en el desarrollo de estrategias de comunicación institucional para posicionar la imagen de la ULEAM extensión Bahía de Caráquez, siendo una investigación de tipo descriptiva, se utilizó tanto métodos cuantitativos como cualitativos. Se estudió la percepción de la comunicación institucional en la comunidad universitaria, donde se evaluaron estudiantes, docentes, personal administrativo y de servicio; fue necesario investigar el tipo de campañas que se aplican cuando se difunde información a través de los medios de comunicación y como resultado se obtuvo las campañas de mailing. Entre las principales técnicas utilizadas se puede citar: la revisión bibliográfica, la observación, el muestreo, la encuesta, entrevista, matriz de comunicación interna y externa a su vez los análisis de fiabilidad y validez, se procesaron los datos a través del software SPSS 21, para luego ser analizados e interpretados, se identificaron los elementos más eficientes en las campañas de comunicación institucional; finalmente se realizó una propuesta que declara como se debe desarrollar una estrategia de comunicación institucional y el proceso para difundirla a través de correos electrónicos.

A Linguistic Validation Study on the Filipino Dizziness Handicap Inventory

ABSTRACT
 Objective: To determine the validity and reliability of the Filipino Dizziness Handicap Inventory (FDHI) questionnaire among geriatric patients with dizziness.
 Methods:Design: Linguistic ValidationSetting: Tertiary Government Training HospitalParticipants: Twenty-five (25) patients
 Results: The dizziness handicap inventory was translated into Filipino by a Filipino language specialist and an ENT specialist who are experts in their field. The translated version was easily understood by the 25 geriatric patients with Cronbach α scores of .957 overall [M = 2.16; SD = 1.93]. Sub-domain item-total correlation scores (physical M = 2.6, SD = 1.90, Cronbach α = .860; emotional M = 1.66, SD = 1.84, Cronbach α = .901; and functional M = 2.5, SD = 1.97, Cronbach α = .902) demonstrated validity of the respective subdomains.
 Conclusion: The Filipino Dizziness Handicap Inventory questionnaire is an internally valid tool for assessment of dizziness among geriatric patients. External validity and reliability can be evaluated in future studies employing corroborative measures and repeated testing.

Multiclass Artificial Intelligence in Dermatology: Progress but Still Room for Improvement

We tested a previous 12-disease version of the Han et al. (2018) algorithm and found limited external validity on a 100-image dataset of skin cancer (Navarrete-Dechent et al., 2018). Here, we evaluated the external validity and reliability of the newly updated 174-disease Han et al. (2020b) algorithm and a recently published region-based 178-disease algorithm (Han et al., 2020a) using the same dataset.

Use of Neurodynamic or Orthopedic Tension Tests for the Diagnosis of Lumbar and Lumbosacral Radiculopathies: Study of the Diagnostic Validity.

Background: Lumbar radiculopathy is a nerve root disorder whose correct diagnosis is essential. The objective of the present study was to analyze the reliability diagnostic validity of eight neurodynamic and/or orthopedic tension tests using magnetic resonance imaging as the Gold Standard. Methods: An epidemiological study of randomized consecutive cases which was observational, descriptive, transversal, double blinded and was conducted following the Standards for Reporting Diagnostic accuracy studies (STARD) declaration. The sample size was 864 participants. Internal and external validity (CI = 95%) and reliability, were calculated for all tests performed independently. The diagnostic validity of the combined and multiple tests in parallel was also calculated. Results: The analysis indicated that only two tests performed independently had external validity, but neither had reliability or precision. The Straight Leg Raise test and the Bragard test performed in a multiple parallel way showed high sensitivity (97.40%), high negative predictive value (PV− 96.64%) and external validity (Likelihood Ratio− 0.05). The combined test of the Slump test and the Dejerine’s triad had internal and external validity. Conclusions: The Straight Leg Raise test and the Bragard test performed in a multiple parallel way and the combined test of the Slump Test and the Dejerine’s triad have clinical validity to discard lumbar or lumbar-sacral radiculopathy.

Reliability of Self-Administered Questionnaire on Dietary Supplement Consumption in Malaysian Adolescents.

The repeatability of most questionnaires utilized in previous studies related to the consumption of dietary supplements (DS) among youth has not been well documented. Thus, a simple and easy-to-administer questionnaire to capture the habitual use of DS in the past one year known as the dietary supplement questionnaire (DiSQ) was developed and supported with external reliability evaluation. Analyses were done based on a convenience sample of 46 secondary school students. To elicit information regarding the intake of DS, the questionnaire was partitioned into two domains. The first domain was used to identify vitamin/mineral (VM) supplements, while the second domain was utilized to identify non-vitamin/non-mineral (NVNM) supplements. Cohen’s kappa coefficient (k) was used to evaluate the test–retest reliability of the questionnaire. Questionnaire administration to the respondents was done twice whereby a retest was given two weeks after the first test. Between test and retest, the reliability of individual items ranged from moderate to almost perfect for the VM (k = 0.53–1.00) and NVNM (k = 0.63–1.00) domains. None of the items had “fair” or ”poor” agreement. Various correlation coefficients can be obtained for the DiSQ but are generally reliable over time for assessing information on the consumption of supplements among the adolescent population.

Reliability and validity of Arabic version of revised general nutrition knowledge questionnaire on university students.

The current study evaluated the reliability and validity of the Arabic version of the revised general nutrition knowledge questionnaire (GNKQ-R) for adults. The eighty-eight-item English GNKQ-R was adapted into an eighty-six-item Arabic version. Four validation studies were conducted for internal (n 805) and external (n 106) reliability, construct validity between participants with (n 84) and without (n 88) nutrition background, convergent validity for associations between nutrition knowledge and demographic characteristics (n 750) and responsiveness to online nutrition information (n 55). United Arab Emirates University in United Arab Emirates and Hashemite University in Jordan. Undergraduate students aged 18 years and above, enrolled in any programme at the two universities, were recruited. Overall, internal reliability (Cronbach's α = 0·91) and external reliability (P = 0·350; intra-class correlation coefficient = 0·84) were high. Significantly higher GNKQ-R scores of students with (66·0 (10·6)) v. without (38·0 (10·7), P < 0·001; d = 2·6) nutrition background indicated high construct validity. Significantly higher GNKQ-R scores among females v. males, older and senior students v. younger and junior students and students in health discipline v. non-health discipline reflected good convergent validity. Significant differences in GNKQ-R scores with nutrition information (time 1 = 37·8 (10·5) and time 2 = 47·7 (9·1), P < 0·001; d = 1·0) indicated high responsiveness to nutrition intervention. The Arabic GNKQ-R showed high reliability and validity in the young adult Arab population. Besides the reliability of the overall questionnaire, each section demonstrated adequate reliability. Further studies are warranted to establish the generalisability and applicability of the Arabic GNKQ-R in older adults and in different middle-eastern Arab countries.

Development and validation of a food literacy instrument for school children in a Danish context

Food literacy (FL) is an aim of food education and cooking interventions, but is defined and measured in different ways. In this study we developed, tested, and validated a FL instrument targeting children aged 12–14 years that builds on a broad 5-dimensional FL concept that includes the competencies of knowing and doing, as well as the rarely investigated competencies of using the senses, caring for others, and wanting to participate as a citizen regarding food issues. The study had 3 phases: 1) item development involving an expert panel; 2) scale testing comprising a face validity test with 12 pupils and a test with 817 pupils, of which 267 took part in a retest; and 3) scale validation including testing dimensionality by confirmatory factor analysis (CFA), internal reliability by Cronbach α, external reliability by intraclass coefficient (ICC), and convergent and predictive validity by regression analysis. CFA showed an acceptable model fit, confirming the concept of FL as 1 factor and its 5 distinct competencies as subfactors. There was good internal reliability for total FL score (α = 0.85) and good external test–retest reliability (ICC = 0.92). Convergent validity for a similar health literacy construct was significant for the total FL scale and its 5 competencies; this was also true for the predictive validity of FL with food intake as an outcome. This 37-item, 5-dimensional FL instrument can be used to assess FL levels in children and can guide food and nutrition education.

Computerized Accounting Systems: Measuring Structural Characteristics

This study aimed to develop a standard measurement tool for the effective assessment of computerized accounting systems (CAS) quality and effectiveness based on systems theory, in terms of their structural characteristics or functional components. The researcher identified five structural characteristics (components or subsystems) of CAS, namely internal controls, automated data-processing, relational database, automated reporting, and enhancing technologies components. The operationalization of these structural characteristics resulted in a 25-item index that forms the measurement tool developed. The 25-item index was constructed based on the review of prior literature to ensure content validity. The CAS measurement tool was administered to 384 active members of the Institute of Chartered Accountants of Nigeria (ICAN) through an online survey, and 234 useful responses were collected and analyzed to test the validity and reliability of the measurement tool. The researcher assessed the construct validity of the CAS measurement developed using the exploratory factor analysis, and the internal and external reliability using the Cronbach’s alpha test of consistency and test-retest statistics, respectively. The results of the study suggest that the CAS measurement tool developed has strong content and construct validity as well as high internal and external reliability. It is, therefore, believed that the tool would yield valid and reliable results when employed in the assessment of computerized accounting systems. The study is significant as it introduces a new approach to assessing the quality of accounting information systems in terms of their structural characteristics instead of qualitative characteristics such as perceived advantages and ease-of-use of the systems. Further research is suggested to confirm the validity and reliability of the CAS measurement tool presented in this study. Keywords: Accounting information systems, Automated data-processing, Automated reporting, Computerized accounting systems, Enhnacing technologies, Functional components, Internal controls, Relational database, Structural characteristics, Systems theory DOI: 10.7176/RJFA/11-16-05 Publication date: August 31 st 2020

Psychometric properties and contextual appropriateness of the German version of the Early Development Instrument

BackgroundAssessing the early development of children at a population level in educational settings, may be useful for public health and policy decision making. In this study, we evaluated the psychometric properties and the contextual appropriateness of a German language version of the Early Development Instrument (EDI), a survey-based instrument originally developed in Canada, which assesses developmental vulnerability for children in preschool settings.MethodsSixty preschool teachers from six preschool organizations (22% of organizations contacted) in three cities in southwest Germany participated. They administered a German version of the EDI (GEDI) to 225 children (51% of eligible children). We assessed internal consistency, test-retest and interrater reliability. Preschool teachers assisted in determining face-validity by reviewing item coverage and comprehensibility. Exploratory factor analysis (EFA) was used to evaluate convergent validity. Concurrent validity was measured using correlations and agreements (Bland-Altman plots) between GEDI and other validated instrument scores. Additionally, we compared associations between GEDI domain scores and sociodemographic characteristics with similar associations in EDI studies worldwide.ResultsGEDI domains showed good to excellent internal consistency (0.73 < α > 0.99) and moderate to good test-retest and interrater reliability (0.50 to 0.81 and 0.48 to 0.71, respectively [p-value < 0.05]). Face validity was considered acceptable. EFA showed a factor structure similar to the original EDI. Correlations (range: 0.32 to 0.67) and agreements between GEDI scores and other German language instruments suggested good external reliability. Scoring within the lowest 10th percentile was strongly associated with age.ConclusionsOur psychometric assessment suggests good reliability and consistency of the GEDI. Differences in the age distribution of children, pedagogical objectives and educational system features of German preschools require future work to determine score thresholds indicative of vulnerability. Aside from dropping selected items from the original EDI that were inconsistent with features of the German educational system, the distribution of values in the language and cognitive development domain also suggested that context-specific cut-offs must be established for the German version. Such efforts are needed to account for relevant contextual differences between the educational systems.

Endometriosis reproductive health questionnaire (ERHQ): A self-administered questionnaire to measure the reproductive health in women with endometriosis

IntroductionEndometriosis is a disabling disease impacting on different aspects of reproductive health. The present study aims to develop and evaluate the psychometric properties of a questionnaire to measure the reproductive health in women with endometriosis. Material and methodsThis study used an exploratory mixed-methods design and included three phases. In the first phase, a sample of 20 women with endometriosis participated in semi-structured interviews. In the second phase, item pools were generated. In the third phase, face validity, content validity, and construct validity were assessed. To estimate the reliability of the tool internal consistency and test-retest methods were used. Resultssixty items were included in the psychometric evaluation stage of the scale. After the assessment of the content validity ratio (CVR), content validity index (CVI), and exploratory factor analysis, 15 items were omitted, leaving 35 items in the final scale. The exploratory factor analysis revealed four factors: physical problems, psychological problems, counteracting strategies, and instability of marital life. The reliability, according to Cronbach’s alpha was 0.809, and the external reliability, as evaluated by the test-retest method and the intraclass correlation, was 0.825. ConclusionERHQ is a new, valid, and reliable patient-generated instrument to measure the reproductive health in women with endometriosis. It can be used by researchers and health providers to provide a better understanding of the impact of endometriosis on different aspects of reproductive health over time and to meet the needs of patients living with this condition.

The psychometric testing of the functional, communicative, and critical health literacy tool

ObjectiveThe purpose of this study is to assess the validity and reliability of the English version of the FCCHL tool in urban and rural, socioeconomically vulnerable or unstable, chronic comorbid adults in the United States. MethodsA cross-sectional study measuring both validity and reliability. ResultsA total of 276 participants were recruited. Internal consistency was measured using Cronbach’s alpha of α = 0.87. External reliability was measured by test-retest methodology. Construct validity was measured using Confirmatory Factor Analysis that showed good fit. Criterion validity was measured by comparing the mean scores of the FCCHL tool sub-scales. Concurrent validity was measured by comparison of means of the FCCHL tool and education level compared to the NVS and s-TOFHLA. ConclusionThe results demonstrated that the FCCHL tools is measuring three different concepts. Overall, the FCCHL tool was seen to have good validity and reliability in the identified population. Practice ImplicationsThe FCCHL tool is a 14-item, self-report health literacy tool measuring more than functional health literacy. The tool can be used in practice to improve not only functional health literacy, but also communicative and critical which is highly applicable.

Agent-based Testing: An Automated Approach toward Artificial Reactions to Human Behavior

ABSTRACTVast amounts of news are consumed through algorithmically curated media environments, such as search engines, social networking sites, or news aggregators. This renders algorithmic content curation with much societal relevance and highlights the urgent need for independent and resilient academic research. Therefore, a plethora of methodological approaches have been applied, such as case studies, expert interviews, observations, or agent-based approaches. The paper discusses the applicability of these methodological efforts for journalism studies, showing that all of these approaches face their limitations, especially with regard to external validity, recruitment difficulties, and data reliability. Thereby, agent-based testing represents one of the most promising approaches to overcome plenty of these methodological limitations. Agent-based testing is a systematic and experimental approach that emulates online human behavior to test algorithmically curated media environments under various conditions. For this to be achieved properly, this paper suggests a multitude of settings and requirements to adequately face the technological, legal, and ethical challenges, which come with the empirical investigation of algorithmic content curation. Ultimately, the paper presents both general considerations and practical instructions (using the “ScrapeBot”) to employ agent-based testing for journalism studies.

Development and psychometric evaluation of waste separation beliefs and behaviors scale among female students of medical sciences university based on the extended parallel process model

BackgroundThe increasing production of un-recycled waste is a great threat to public health. Therefore, assessment and measurement of people’s beliefs and perceptions with regard to these threats can contribute to the development of suitable educational messages promoting waste separation behaviors. This study aimed to carry out the scale development and psychometric evaluation of behaviors and beliefs associated with waste separation among female students.MethodThis methodological research was performed in 2019. The primary questionnaire was developed based on the assessment of waste separation beliefs and behaviors based on the extended parallel process model. Afterwards, to confirm the content and face validity of the research tool, the opinions of 14 faculty members and certain students were asked for, respectively. In order to assess the construct validity of the questionnaire, exploratory factor analysis was performed based on the data collected from 386 female students in Isfahan University of Medical Sciences, Iran. The internal and external reliability of the tool was determined through estimating Cronbach’s alpha and test-retest based on intraclass correlation (ICC) index, respectively.ResultsThe mean age and academic semester of the students were 22 ± 1.9 years and 5.58 ± 2.6, respectively. The primary version of the questionnaire was designed with 65 items; one item was omitted during the content validity process. Construct validity with factor analysis technique yielded nine dimensions including 64 items with a factor loading above 0.3. The overall reliability of the research tool was confirmed at Cronbach’s alpha of 0.87. Furthermore, the ICC of the entire questionnaire was 0.89.ConclusionAccording to the results of the study, the final 64-item questionnaire could be used by various researchers to assess waste separation beliefs and behaviors considering suitable psychometric features.

Reliability and validity of a General Nutrition Knowledge Questionnaire for adults in a Romanian population

BackgroundNutritional knowledge assessment is an important component in nutrition research, and a prerequisite for the implementation of many policies and programs aimed at improving eating behavior. In order to generate objective results, validated tools for a given population must be employed. The aim of this study was to determine the validity and reliability of a nutrition knowledge questionnaire for Romanian adults.MethodsKleimann’s version of a General Nutrition Knowledge Questionnaire, was translated and adapted to Romanian language, culture, and cuisine. The final format was developed in several steps and used four components: internal and external reliability were assessed in a general population sample (n1 = 412), respectively in a subgroup (n2 = 46) from Component 1; Component 3 assessed construct validity (n3 = 96) using the “known-groups” method; Component 4 (convergent validity, n4 = 508) tested the association between socio-demographic characteristics and nutrition knowledge.ResultsThe overall internal reliability was 0.878 and the external reliability was >0.880 in all sections, and overall. Specialists had higher scores than nonspecialists, with a very large effect size. In the general population, females scored higher than males, and middle-aged and older adults scored higher than young adults. Higher scores were associated with higher levels of education. The characteristics of individuals prone to giving wrong answers were: males (beta = 0.170), high school or less (beta = 0.167), and no training in nutrition (beta = 0.154).ConclusionsThe Romanian version of the General Nutrition Knowledge Questionnaire is a reliable and valid tool for measuring nutrition knowledge in adults.

Reliable Bounding Zones and Inconsistency Measures for GPS Positioning using Geometrical Constraints

Reliable confidence domains for Global Navigation Satellite System (GNSS) positioning and inconsistency measures of the observations are of great importance for any navigation system, especially for safety critical applications. In this work, deterministic error bounds are introduced in form of intervals to assess remaining observation errors. The intervals can be computed based on expert knowledge or based on a sensitivity analysis of the measurement correction process. Using convex optimization, bounding zones are computed for GPS positioning using the geometrical constraints imposed by the observation intervals. The bounding zone is a convex polytope, where exploiting only the navigation geometry, confidence domain is computed in form of zonotope. We show that the relative volume between the polytopes and the zonotope is an inconsistency measures. Small polytope volume indicates bad consistency of the observations. In extreme cases empty sets are obtained which indicates large outliers. We determine the observation intervals via sensitivity analysis of the Klobuchar ionospheric model and Saastamoinen tropospheric model. The remaining errors are treated as white noise. We explain how the shape and the volume of the polytope are related to the positioning geometry. We show that this assignment has to be interpreted with care. Furthermore, we propose a new concept of Minimum Detectable Biases (MDB). Taking GPS data from simulations and real experiments, a comparison analysis between the proposed deterministic bounding method and the classical least-squares adjustment has been conduct in terms of accuracy and reliability. This helps validating that our proposed deterministic bound methods shows high internal and external reliability compared to the probabilistic approaches and that it provides rigorous inconsistency measures.

Precision and Reliability of Tightly Coupled PPP GNSS and Landmark Monocular Vision Positioning.

This paper presents an approach to analyse the quality, in terms of precision and reliability, of a system which integrates—at the observation-level—landmark positions and GNSS measurements, obtained with a single camera and a digital map, and a single frequency GNSS receiver respectively. We illustrate the analysis by means of design computations, and we present the actual performance by means of a small experiment in practice. It is shown that the integration model is able to produce a position solution even when both sensors individually fail to do so. With realistic assumptions on measurement noise, the proposed integrated, low-cost system can deliver a horizontal position with a precision of better than half a meter. The external reliability of the integrated system is at the few decimetre-level, showing that the impact of undetected faults in the measurements, for instance incorrectly identified landmarks in the image, on the horizontal position is limited and acceptable, thereby confirming the fault-robustness of the system.

Feasibility and reliability of DEXA analysis after total ankle arthroplasty: A cadaver study

BackgroundAlthough the outcomes of total ankle arthroplasty (TAA) have improved, unsolved problems such as stress shielding remain. Although dual energy X-ray absorptiometry (DEXA) is the “gold standard” for evaluation of these issues, it is rarely used in patients after TAA. This study aimed to establish a scan technique and to assess the mechanical changes in bone density caused by bone stock preparation. MethodsEight fresh-frozen cadaver legs were investigated by DEXA before TAA, with implant in situ, and after implant removal. Scan surface, bone mineral content, and bone mineral density were analysed to assess mechanical bone mass changes. ResultsWe examined data for density changes by bone compression after TAA, and found “good” results for internal reliability but only “acceptable” results for external reliability. ConclusionsThe results were reliable and reproducible. Using the present data, mechanical and biological processes can be considered together to understand the postoperative phases of bone remodelling after TAA.

Structure orderliness assessment of grid development to improve the reliability of coal mine external electrical power supply

State-of-the-art reliability assessment methods require a large amount of initial statistical data, which does not always have the necessary degree of accuracy for accurate assessment. Moreover, this data is often difficult to obtain, which can ultimately delay the execution of calculations and increase error within results. This paper explores an alternative assessment method using the “structural orderliness indicator” and minimal initial data to calculate the change in reliability indicators in connection with reinforcement decisions. This paper includes the cost of reconstruction associated with the introduction of a new unit cost indicator for increasing the structure orderliness index. As a real-world application, the following discussion proposes improvements to external electrical power supply reliability for coal-mining enterprises within the Russian Federation, such as in the Kemerovo region (the biggest coal-producing region of Russia). In recent years, the number of production process suspensions and emergency shutdowns of life support facilities has increased due to external power supply disruptions. The performed calculations made possible qualitatively comparison the proposed method and state-of-the-art method based on the determination of reliability indices (SAIDI, SAIFI, etc.).