1)What is the main difference between SNP planned orders and PP/DS planned orders.
When the situation will arise SNP Planned cover requirements outside of the PP/DS horizon.
2)What is the difference between the fixed PP/ds orders and PP/DS orders.
PLease explain me the problem
1--> SNP Planned orders work outside of the SNP horizon(technically it should be lesser than PPDS horizon for overlap). they are usually relevant for medium term planning taking rough cut capacities into account. They are usually accurate to the day. They can be converted to a PPDS order which are short term in nature that take detailed level capacities/materials into account. They are accurate to the minute. They are also relevant for scheduling. PPDS orders are usually created inside PPDS horizon and in the rare occasion where it runs out of capacity, it can potentially create orders outside the PPDS horizon.
2--> Fix is just the statement of affirmation of the order. A PPDS order that is not fixed is still tentative in nature that can be cancelled/rescheduled etc. Fixed order is not yet a production order, however is very less tentative.