Abstract
A number of sampling plans are available for the calculation of the frequency of tests/inspection to be performed for a construction task. Not all the existing plans are suitable for the construction industry. In this study an alternative model adopting Minimum Cost Method is developed to determine the optimum number of inspections at which the cost of the inspections will be minimised. The method is based on minimising total costs including prevention costs, appraisal costs and failure/rectification costs. If the average defective proportion and its standard deviation for a process are known from past data and the cost ratio of failure and initial costs are available, then the minimum required number of inspections per lot can be calculated. An example is presented to illustrate the application of the method. The example has shown that the number of samples to be tested/inspected per lot not only depends on the average defective proportion but also on the cost of failure and the cost of prevention and appraisal.
| Original language | English |
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| Title of host publication | Proceedings of the 1st International Conference on Construction Project Management and Construction Engineering (iCCPMCE-2018), 3-6 December 2018, Sydney, Australia |
| Publisher | Science, Technology and Management Crest |
| Pages | 258-264 |
| Number of pages | 7 |
| Publication status | Published - 2018 |
| Event | International Conference on Construction Project Management and Construction Engineering - Duration: 3 Dec 2018 → … |
Conference
| Conference | International Conference on Construction Project Management and Construction Engineering |
|---|---|
| Period | 3/12/18 → … |
Keywords
- construction industry
- inspection
- cost effectiveness