Construction of villas

Sunil Hi,

wondeirng, are the villas all typical ? does any of them have any specific requirements, then i would recommend you classify each type separate thus you are able to use the same resources more efficiently to start.

Regards

Waseem Saber

Thanx  Samber..

What kind of structures are we talking, wood frame or all concrete and masonry.

If the villas are all concrete then you might look for the most efficient use of equipment at times by using overtime on activities that require the equipment but use less labor.

Let say you have 3 motor cranes to be shared for form-work and concrete placement. It is more efficient to use the cranes on regular hours for form-work and concrete placement on slabs because theses activities use larger crews. Then late in the afternoon, during overtime hours place the concrete on walls and parapets. While the form-work crews can consist of 20 people each and slab placement crew of about 10 the crew required for concrete placement on walls might be a crew of four.

Putting this logic on a schedule might result in too much detail but the analysis might help on how to schedule the sharing of your resources using partial assignment. So instead of separate activities for form-work, reinforcing steel, rough-in and concrete placement on walls a single activity can model all operations and their resource usage. Call the activity Concrete on Walls Villa 1, Concrete on Walls Villa 2, ... and resource load the activities using partial assignments, say 80% form crew will be working on the activity, 20% electrical and plumbing rough-in crews will be working on the activity, 20% concrete pouring crew will be working on concrete placement.

For elevated slabs combining from-work, re-steel, rough-in makes sense but concrete placement shall be modeled as a separate activity. The key is on merging the related activities that have the same resource assignments on a given day and keep as separate the activities that do not occur every day within similar partial assignments. Note that as long as the partial assignment every day are similar a single activity might be enough to model several consecutive days.

Too much detail can be impractical but you still must account for limited equipment availability, learn how to model equipment sharing without going into excessive details or even worst avoid using hammocks that will not account for limited resources. 

Good Luck.

Hi Rafael,

I tried the logic of grouping of activities also avoided hammock, since there is no specific critical path I created 3 zones 

and arranged the manpower accordingly (For structural and finishes separate gangs) . There are 4 types of villas

also no complicated design , plain structure with all types almost similer design. Thanks for your valuable reply, can you 

sujest something regarding the logistics..

Regards,

Sunil.

The logistic on each individual villa shall be a no-brainer. It is the remaining works that can be the most challenging.

Before going directly to the schedule software you shall understand all the contract conditions. The following items among others might determine the overall logistic or sequence of work.

• Soil charasterisitics such as prescence of rock or unsuitable material that must be replaced. 
• Special contractual requirements like sequence of partial deliveries.
• Electrical and other utilities Distribution
• Sitework improvements
• Acess to work areas
• ....

There are other considerations like rainy season, hot weather, cold weather that shall be considered globally.

If you work for a developer or a contractor-developer and you have financial constraints that might determine how fast construction should go these shall also be considered. Real Estate development is mostly about cash flow.

Based on the information this is how far as I can go.

Good luck.

Thanks a lot Rafael...