2. Production planing

Question 1

Fig. Uncapacitated Lot-Sizing Model

Answer 1

The items production plans are linked: capacity restrictions and common resources

Question 2

Fig. Master production scheduling model

Answer 2

Question 3

Material requirements planning model

Answer 3

Question 4

bill of materials (BOM)

Answer 4

represents the dependency between items based on the product structure

Question 5

Types of product structures in multi-level models

Answer 5

Question 6

Make-to-stock (MTS)

Answer 6

independent demand must be already in stock
- All procurement and production activities in anticipation of the demand (demand forecasts)
- Ideal for standard products, little variety or diversity (fast moving consumer goods)

Question 7

Make-to-order (MTO) or Assemble-to-order (ATO):

Answer 7

• Some activities are performed after the external ordering
• Delivery lead-time: time promised to customers for delivery
• At the time of ordering: enough raw materials or semi-finished products in inventory
• Remaining production lead-time ≤ commercial lead-time

Question 8

Fig. MTS and ATO production policies

Answer 8

Question 9

Fig. Master Production Scheduling (MPS)

Answer 9

• Gross requirement: max{firm orders, forecasts}
• Net requirements: minimal additional production quantities to satisfy the gross requirements
• proj. inv.= init. inv. + sched. receipt + finished MPS orders - gross req
• Available to promise: accept new order or not?
  t = 1: Curr. inv. + Sched. rec. + Net req. - Real dem.
  t > 1: Sched. rec. + Net req. - Real dem.

Question 10

Rough Cut Capacity Planning (RCCP)

Answer 10

• Simplest case:
  1. MPS without capacity restrictions
  2. RCCP computes the load profiles for resources using simplified BOM or historical data
  3. If load > capacity: adapt the MPS
• “Rough”: only final stage considered

Question 11

Final Assembly Scheduling (FAS)

Answer 11

determines when to realize the operations to transform the intermediate items into finished products

Question 12

Fig. Planning models for an ATO policy

Answer 12

Question 13

Fig. Material Requirement Planning (MRP) table

Answer 13

No independent demand for C

Question 14

Fig. Architecture of Advanced Planning Systems

Answer 14

Question 15

Two generic classes of supply chain planning problems ?

Answer 15

1 Strategic network design problems
2 Supply chain master planning problems