Dear Shweta,
It is is a mistaken view to say that manpower planning requires training. The second mistaken view every topic/subject can be learnt through games only.
Manpower planning requires study of your systems and processes. It is more a matter of consulting than training as such.
Manpower planning depends on (a) capacity (b) demand and (c) skills of the people. However, this is very broad categorisation.
For example, in the restaurant, number of chairs (number of covers in hotelier's language) decide how many waiters you should have. Number of waiters decide number of captains.
In the star hotels, number of rooms decide the requirement of housemen, room service staff etc.
But then both the above examples depend on the market demand also.
In the courier and logistic industry, you need to keep the manpower whether demand or not. For example, number of deliveries made cannot be the sole criteria for deciding the number of couriers. This is because we have to take into account the traffic situation also. In big cities at certain places, commercial vehicles move at 5-10 KM/hour. Then manpower depends on the volume of load to the picked up also. You need to have sufficient loaders depending on the load.
Therefore, there is no generalisation and manpower planning will differ from one industry to another, one product to another, one city to another etc.
Ok...
Dinesh Divekar