Dear Mahaurkar,
I have mentioned suitability of JIT in the previous post. JIT is not suitable for the project based work. Many times projects depend on the geography location, remoteness from the major cities, type of material requirement, complexity of the projects, duration of the projects, support from the customers etc. This is in contrast with the factory products that have steady production of clearly defined standard products.
If not JIT, PMP based project planning will help you in executing projects in organised manner. However, in your second post also you have not give complete information. What kind of projects do you handle, what type of customers do you have, variability of the customers, geographical location of the projects, whether material is imported etc. Neither technical details of the project, nor even your first name!
Thanks,
Dinesh Divekar