Know how to purchase the best possible items for a job so that items and equipment satisfy the quality and cost requirements set by the company and also match the specification of the job.
The parent node(s) for this knowledge are.
The child or prerequisite node(s) for this knowledge are.
Parent nodes show knowledge which can only be known fully by a human expert if they also understand this item of knowledge.
Child or prerequisite knowledge is knowledge which a human expert must already understand if they know this knowledge fully.