Which philosophy uses continual improvement to reduce manufacturing waste, minimize inventory, and get to zero defects?

• A. Facility master plan
• B. Functional/structural model
• C. Just-in-time
• D. Job enlargement

Answer: (C)

The idea being tested is a manufacturing philosophy that aims to eliminate waste through a pull-based, continuous-improvement approach, driving toward minimal inventory and zero defects. Just-in-time trains the production system to match demand, so parts are produced only as they are needed, which reduces overproduction and lowers inventory carrying costs. It also centers on ongoing improvement (kaizen) and building quality into the process, so defects are caught and prevented at the source rather than after they occur. Tools like kanban help signal when to make more, supporting smooth, small-batch production and reliable supplier coordination. All of this directly targets waste reduction, lean inventory, and defect-free output.

Other options don’t fit this focus. A facility master plan is about long-term layout and capacity decisions, not the day-to-day pull, flow, and continuous-improvement approach. A functional/structural model concerns organizational design and reporting structures, not manufacturing waste reduction or inventory control. Job enlargement is about expanding a job’s tasks for employee motivation or skill variety, not about creating a system to reduce waste, minimize inventory, or achieve zero defects.