There are six most common methods to measure progress : units completed, incremental milestone, supervisor opinion, cost ratio, and weighetd or equivalent units. In order to get clear understand of those method, this blog will try to analys which method will be suitbale to be used to the following simple case.
Figure 1 : Cross Section CSP
The works is construction of Corrugated Steel Pipe [CSP] 1800 Dia L 8m. The works consist of : excavation, sand bedding, laying CSP, and backfilling. Pay item will be only laying CSP, no separate pay items for sand excavation, sand bedding, and backfilling. Client will require contractor to produce daily report which shall clearly report daily progress work achievement. The following table are estimated by Contractor to complete the works.
Figure 2 : BAC, Duration, and Men Hours
The Question is : How to measure daily achievement of works as required to be reported to Client.
As mentioned above, there are six most common methods to measure progress :
- Units completed
- Incremental milestone
- Start finish
- Supervisor opinion
- Cost ratio and
- Weighted or equivalent units
TOOLS AND TECHNIQUES
Conclusion will be made by comparing suitability of each method
SELECTION of PREFERRED ALTERNATIVE
Figure 3 : BAC, Duration, and Men Hours in percentage
Assessment to the feasible alternatives can be explain as the following :
Alternative 1 Units Completed : Each subtask can not be accomplished simulatenously thus this alternative is not applicable.
Alternative 2 Incremental Millestone : Subtask is handled in sequence thus this alternative migh be applicable.
Alternative 3 Start Finish : Effor time required for each subtask is not very difficult to estimate thus this alternative is not applicable.
Alternative 4 Supervisor Opinion : This method might be applicable however, this is subjective approach. The major problems is that some superviors are optimists and some are pessimists thus this method is not recommended.
Alternative 5 Cost Ratio : Tasks does not involve a long period of time thus this method is not applicable.
Alternative 6 Weighted or Equivalent Units : Tasks does not involve a long period of time thus this method is not applicable.
Based on the aforementioned selection therefore it can be concluded that Alternative 2 is applicable method to be used. Therefore, progress can be measured Excavation : 11% in total, sand bedding 33% in total, laying CSP 56% in total, and back filling 100% in total.
MONITORING & POST VALUATION
Daily report can be presented to Client using incremental milestone method as described in alternative 2.
- Giammalvo, P.D. (2012). AACE Certification Preparation Course Handouts.
- Humphreys, G.C. (2011). Project Management Using Earned Value Second Edition. Humphreys & Associates, Inc.
- The Education Board of AACE International.(2010). Skills & Knowledge of Cost Engineering 5th Edition Revised. AACE International.