Variety denotes the number and diversity of goods or services that an operating process provides. Producing many different but related products still represents high variety, even where common machinery or components are shared. Variety increases routing, scheduling and changeover complexity, often requiring flexible equipment and multi-skilled workers. Variation refers instead to demand changing through time. Volume concerns how many units are made, and visibility concerns how much the customer observes the operation. Managers can apply this concept through process mapping, demand analysis and suitable operational KPIs. Changes to the workflow should be tested for their effects on queues, defects, throughput and customer outcomes. Understanding whether an input is transformed or transforming also makes resource responsibilities and capacity constraints clearer. The appropriate selection is high variety. This follows from the distinction between the concept described and the alternative activities or measures in the answer choices. The selected approach should be documented and monitored so that managers can distinguish normal process behaviour from avoidable performance problems.
Study Guide Reference: CIPS L5M9 – Evaluate operations management processes; the uploaded question bank cites study-guide page(s) 49.
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