What is the measured mile method for productivity loss?
The measured mile compares how fast a crew worked in an undisturbed part of the job with how fast it worked in a disrupted part. The difference, priced at actual cost, is the productivity loss.
How it works
- Pick an activity that was disrupted, such as laying pipe or fixing plasterboard.
- Find a period of the same activity with no disruption.
- Measure output per hour in both periods.
- Apply the gap in output to the disrupted quantity and price the lost hours.
Example
A crew fixes 40 square metres a day in a clear area and 25 square metres a day in a congested area. The congested area lost 15 square metres a day. Priced at the crew's actual daily cost, that is the claim.
What makes it strong
The two periods must be like for like. Same trade, same type of work, similar conditions. Good daily records of hours and quantities make the method reliable.
When it does not fit
If no clean period exists, other methods such as industry studies or a comparison with the tender may be used. They carry less weight.
Related answers
Questions
Do I need a clean period on the same job?
It is the best evidence. Without one, you need another basis, and the claim is easier to challenge.
What records do I need?
Daily labour hours and daily quantities, by activity and by area.
Need this done for your project?