The cost of training a storeroom attendant is typically justified by inventory integrity . A trained storeroom attendant protects the accuracy, availability, identification, storage condition, and transaction discipline of maintenance inventory. Poorly trained storeroom personnel create hidden reliability losses: inaccurate stock counts, wrong parts issued, obsolete material retained, critical spares misplaced, duplicate items purchased, emergency procurement increased, and technicians delayed at the point of execution. Option A, inventory valuation, is a financial accounting result; it may improve indirectly through better inventory control, but it is not the primary reliability justification for training the attendant. Option C, inventory degradation, is only one risk within poor storeroom management. Inventory integrity is broader because it includes accuracy, correct identification, preservation, kitting, issuing discipline, and replenishment control. In CRL Work Execution Management, materials management directly affects planned maintenance execution. Reliabilityweb’s storeroom guidance stresses the importance of inventory accuracy and explains that maintenance, planning, operations, and management are all impacted by procedures designed to improve inventory accuracy. That is precisely why trained storeroom personnel are justified.