JNTU B.Tech III PRODUCTION PLANNING AND CONTROL Previous Question Paper (August/September - 2021 - R18)

Production planning is the pre-production activity focused on determining what, how, when, and where to produce. It involves setting objectives, forecasting demand, and scheduling resources to ensure optimal utilization. For example, a furniture manufacturer planning the production of 500 chairs by scheduling raw material procurement and allocating labor hours for the next month is engaged in production planning.

Production control is the execution phase that monitors and regulates the production process to ensure it adheres to the plan. It involves dispatching, progress reporting, and taking corrective actions if deviations occur. For example, if the furniture manufacturer discovers a machine breakdown or a shortage of wood, production control intervenes to reschedule tasks or adjust the workflow to meet the original deadline.

The complexity of production control arises from several dynamic factors that disrupt planned operations:

• Demand Variability: Fluctuations in customer orders and market trends make it difficult to maintain stable production schedules, often leading to either stockouts or excess inventory.
• Process Complexity: In multi-stage manufacturing, the interdependency of various operations means that a delay in one department (e.g., machining) creates a bottleneck that propagates through the entire system.
• Resource Unreliability: Unplanned equipment downtime, maintenance requirements, and labor absenteeism directly impact the capacity and throughput of the production line.
• Supply Chain Disruptions: Delays in the arrival of raw materials or components from suppliers can halt production, requiring constant adjustments to the production sequence.
• Product Variety: High-mix, low-volume production environments require frequent setup changes and retooling, which increases the complexity of scheduling and sequencing tasks.
• Quality Issues: The occurrence of defective parts necessitates rework or scrap, which consumes additional resources and disrupts the planned flow of production.