Study of Capacity Planning

Dear all consultants,

mostly these are basic Questions but i need straight forword answers to present this topic

1. What is Capacity Planning? what are the Advantages and Disadvantages by using in production order?

2. How can we see previous month Utilisation of load for one work centre?

3. how it is loading and over loading while running the production Order & where it will effect?

4.How can we see 4 to 5 work centres load for particular production order no.?

5. what are the benefits by using capacity planning in prod order?

6. Is their more effect related to Cost centre by assigning to work centre?

thanx.....