Purchasing department relationships

The process responsible for taking care of the resources is called the secondary process. Examples are maintenance or internal transportation, and the personnel department, material purchase, etc. Finally there is a tertiary process present in an organization, that directs and co-ordinates the primary and secondary processes, and their relationship with each other and the environment. 

U.S. Department of Knergy (DOK) solar contractors held In September, 1981, the consensus moved away from 20-year life cycle costing. For residential systems, payback was seen as the most appropriate criterion with a median recommended payback time of 6 years. For commercial systems, vrtiere the purchaser Is more sophisticated, life-cycle costing was seen as appropriate, hut with a 10-year time horizon.( ) Additionally, a recent DOE marketing study ( 3) Indicated that a definite relationship exists between payback and market penetration, with penetration dropping below 20% for payback periods greater than 8 years. 

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