Abstract
Craftsman Questionnaire Sampling (CQS) was recently developed for performance measurement and productivity improvement at construction sites. CQS uses a questionnaire to collect data. It has the virtues of the Craftsman Questionnaire Survey, which provides information regarding the sources of delays, the amount of rework performed, as well as creating a participating atmosphere on site. Meanwhile, CQS imitates the sampling procedure from the Work Sampling method by randomly selecting craftsmen in the field and asking them to determine the activities involved in the immediate past. This procedure empowers the CQS to apply the theory of binominal distribution to estimate ratio delays and to maintain the advantages of relative simplicity and statistical reliability as the Work Sampling method does. CQS was tested at a large nuclear power plant site. The results indicated the feasibility and efficiency of CQS in helping construction management identify delays that could provide a base for productivity improvement.
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