Assigning Material, Labor, Machine to Activities

Hi,

I have a construction project. We have requirement of costing, cost of each activity including material, labor and machine is calculate on finished work, below is an example:

Our Activity is u201CConstruct Wall 100m2 u201D

To construct a 1m2 WALL, I need some machines, labors and materials as follows:

0.5 m3 Sand = 0.5 * 10$

10kg Fe = 10* 2$

10 kg Cement = 10 * 1$

2h labor (Worker) = 2 * 50$

2h machine = 2 * 10$

(This NORM is government stipulate)

This is my solution for this requirement:

I create following master data:

1. BOM named WALL {Sand-0,5kg, Fe-10kg, Cement u2013 10kg}, Unit price 1m2

2. Activity types: Construct Wall, price 50$(Larbor) + 10$(machine), Unit price = 1m2

And then I assign the BOMWALL (1001m2) and activity type to Construct Wall ( 100m2 ) to our activity

Since projectu2019s released, requirement list also is generated

The cost is calculated correctly

But I have to repeat maintain quantity of BOM and Activity Type the same value is 100m2 for the activity

Please give me some comments about this solution. In this case, can anybody consult me for a better solution!

Thank you very much

Long Nguyen