What is the difference in between total planning & netch, neupl, netpl?

By : Sankaran

1. Regenerative planning (NEUPL): System plans all the materials that are contained in the planning file 
  
2. Net change planning (NETCH) or Net change planning in the planning horizon (NETPL): The system only plans materials that have undergone a change relevant to MRP since the last planning run. 
  
NETCH: In net change planning only those materials are planned for which the net change planning indicator in the planning file has been set as a planning file entry. The system usually sets the indicator automatically as soon as a change is made to the material that is relevant to MRP.  
  
NETPL: The system only plans materials that have undergone a change that is relevant to the planning run within the period which you defined as the planning horizon. The system sets the net change planning horizon indicator automatically for these materials 
  
Remember the following point : The changes cause an entry in the planning file to be made: 

• Changes to stock, if these change the stock/requirements situation of the material  
• Creation of purchase requisitions, purchase orders, planned orders, sales requirements, forecast requirements, dependent requirements or reservations  
• Changing to fields that are relevant to the planning run for these receipts and issues or in the material master  
• Deleting receipt or issue quantities 

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