In this type of purchasing, a detailed information package describing what is to be purchased is prepared and distributed to potential vendors. The vendor then responds with a detailed proposal of how they intend to meet the terms in the package. request for proposal spot purchase strategic alliance d. vendor managed inventory The time it takes to do identical operations will naturally vary from one unit to the next. There-fore, it is desirable to have a cushion of several parts within the workstation so that shorter performance times can compensate for longer performance times. This is called providing safeguard for variation in raw material delivery time ob. meeting variation in product demand maintaining independence of operations Od allowing flexibility in produciton scheduling Moving to the next question prevents changes to this