Dear Vikrant,
Your query is half technical and half HR. Mere having HR knowledge is not sufficient to reply this query. Secondly, manpower will depend on what kind kind work your management would like to contract. Few construction companies totally depend on contractors. On the contrary, others oursource the core job and do the finishing on their own.
The manpower at the back end will depend on what kind of ratios your management would like to measure. To measure these ratios, you need to generate that kind of MIS. For this you require a manpower.
Just two days ago, I conducted training for one of the real estate companies. In the last twelve years they have handled six projects. Seventh one is in progress. Following are my observations:
a) They do not do post-project analysis hence past data is not available.
b) They did not make score card for the contractors. Hence they do not know who are good contractors and who are not so good.
c) Disputes are part and parcel of the contract. However, there are not records on the disputes with the contractors. Therefore, dispute on same subject may crop again.
d) They did not make score card for the suppliers. Hence they do not know who are good suppliers and who are not so good.
e) Purchase department does not have proper records on the negotiations with the suppliers. Hence what mistakes procurement professionals did in earlier projects could get repeated.
Your skill development, plan replacements etc. will depend on the above records. To maintain the records for the future, you need to have that kind of set up. However, most of the MDs of the construction are weary of increasing manpower. Indirectly their approach is penny wise but pound foolish.
For further discussion, feel free to contact me.
Thanks,
Dinesh Divekar