You need a schedule to prepare an accurate estimate.
The schedule drives the estimate in two ways.
For direct costs (the costs of doing the physical construction works), the schedule tells us if a task is production driven or productivity driven.
For example, if we have 3km of trenching to do and can trench 100m/shift, we allow 30 shifts. We allocate the mobilisation costs across 30 shifts.
If we only have 50m of trenching, we still have the same mobilisation costs, but we now only have 0.5 shifts of work. We also have additional non-productive time (its hard to fill 0.5 of a shift).
The cost per m of doing 50m is very different to doing 3km.
For indirect costs the schedule tells us how long we need our recurring overhead costs.
How long we need to pay staff salaries, hire site facilities and temporary fencing.
ConstructIQ
You need a schedule to prepare an accurate estimate.
The schedule drives the estimate in two ways.
For direct costs (the costs of doing the physical construction works), the schedule tells us if a task is production driven or productivity driven.
For example, if we have 3km of trenching to do and can trench 100m/shift, we allow 30 shifts. We allocate the mobilisation costs across 30 shifts.
If we only have 50m of trenching, we still have the same mobilisation costs, but we now only have 0.5 shifts of work. We also have additional non-productive time (its hard to fill 0.5 of a shift).
The cost per m of doing 50m is very different to doing 3km.
For indirect costs the schedule tells us how long we need our recurring overhead costs.
How long we need to pay staff salaries, hire site facilities and temporary fencing.
2 months ago | [YT] | 11