Abstract
In today world of competition, one of critical success factors influencing survival, profitability, and competitive advantage of manufacturing organizations is to select appropriate maintenance policy. While decision making grid (DMG) provides a relatively comprehensive perspective to managers for policy making, its criteria does not include overall equipment effectiveness (OEE), perhaps since OEE is mostly used in one of the policies, i.e. total productive maintenance (TPM). In this article, the traditional DMG has been modified, in which the range of OEE has been estimated and replaced by one of the grid's criteria. A case study has been conducted in one of the steel manufacturing companies of Iran and data has been obtained and analyzed from 30 equipments of the company. The major finding of this investigation is that although OEE is an indicator of TPM, its different values might suggest different policies in addition to TPM.
Highlights
Selection of proper maintenance strategies result in energy efficiency
Calculation related to the Overall Equipment Effectiveness (OEE) indicator that has been used in this investigation is addressed as follows: Considering OEE indicator as dependent variable and Mean time between Failures (MTBF) criterion as independent variable, their linear regression is estimate by SPSS software, and the range of OEE indicator is specified in order to be located in the Decision Making Grid (DMG) and will be replaced with MTBF, a more comprehensive indicator than MTBF and frequency of failure will be applied in DMG that in addition to improving grid, shows the effective role of OEE indicator for determining appropriate grid policy and assisting managers in decision making
Considering the two new indicators of Mean Time to Repair (MTTR) and OEE, the equipments are positioned in the developed DMG and appropriate maintenance policy is proposed for the equipments
Summary
Selection of proper maintenance strategies result in energy efficiency. When costs need to be cut and availability increased attention is drawn to the maintenance strategies, regardless of the industry type. They tried to find why in spite of clear emphases on maximizing OEE in organizations, there are many changes and differences between organizations in the ratio of this indicator To address this issue, they used mapping of guiding circles of maintenance and their contrasting relationships in the organization, and stated that the performed activities with short term objectives (as an incorrect term) have ruined organizational capabilities in long term and will result in decreasing OEE. The authors believe that availability can make the bridge between OEE indicator and DMG in determining appropriate grid policies The aim of this investigation is to estimate the relationship between OEE and DMG, whereby provides an appropriate sight to managers in order to select effective and efficient maintenance strategy. New methodology is developed, followed by case study, discussion and conclusions
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