Material Requirements Planning Fundamentals Flashcards

What is the primary goal of Material Requirements Planning (MRP)?

Answer: To minimize inventory and avoid stockouts

The primary goal of Material Requirements Planning (MRP) is to ensure that materials are available when needed for production, while also keeping inventory levels as low as possible. By precisely calculating material requirements and scheduling orders, MRP helps companies avoid both costly stockouts that halt production and excessive inventory that ties up capital.

What inputs are essential for an MRP system?

Answer: Bill of materials, inventory status, master production schedule

An MRP system relies on three core inputs to function effectively: the Bill of Materials (BOM), inventory status, and the Master Production Schedule (MPS). The BOM details all components needed for a product, inventory status indicates what's currently on hand, and the MPS specifies what products need to be made and when, allowing MRP to calculate net requirements and plan orders.

How does MRP determine when to order materials?

Answer: By calculating net requirements and lead times

MRP determines when to order materials by first calculating the 'net requirements' – the actual quantity of materials needed after considering existing inventory and scheduled receipts. It then factors in the 'lead time' for each material, which is the time it takes to receive an order, to schedule the order placement sufficiently in advance of when the material is required for production.

What is the Bill of Materials (BOM)?

Answer: Detailed list of materials and components

The Bill of Materials (BOM) is a comprehensive list that specifies all the raw materials, components, sub-assemblies, and quantities required to manufacture a finished product. It acts as a recipe for production, providing the structural information necessary for the MRP system to break down production needs into individual material requirements.

How does lead time affect MRP?

Answer: It schedules order placement

Lead time is the duration between placing an order for a material and its actual receipt. In MRP, lead time is crucial because it dictates how far in advance an order must be placed to ensure materials arrive precisely when needed for production, preventing delays and maintaining the production schedule.

What is a common output of MRP systems?

Answer: Planned order releases and purchase orders

A key output of an MRP system is a set of planned order releases, which are recommendations for when to place orders for components or raw materials. These planned orders are then often converted into actual purchase orders for external suppliers or production orders for internal manufacturing, ensuring timely procurement and production.

Why is inventory accuracy critical for MRP?

Answer: To ensure accurate planning

Inventory accuracy is paramount for MRP because the system uses current inventory levels to calculate net requirements. If inventory records are inaccurate, MRP might either over-order materials (leading to excess inventory) or under-order (leading to stockouts and production delays), undermining the entire planning process.

How does MRP contribute to production efficiency?

Answer: By timely material availability

MRP significantly contributes to production efficiency by ensuring that all necessary materials are available precisely when they are needed on the production line. This timely availability prevents costly production delays, reduces idle time, and allows manufacturing processes to flow smoothly and continuously.

What challenge does MRP help to address in manufacturing?

Answer: Managing inventory & schedules

MRP systems are specifically designed to address the complex challenges of managing inventory levels and production schedules in manufacturing environments. By calculating precise material needs and timing, MRP helps companies optimize resource utilization, reduce waste, and meet production deadlines effectively.