This document discusses material requirements planning (MRP) and production scheduling. MRP converts a master schedule into requirements for finished goods by taking into account bills of materials, inventory on hand, and demand forecasts. It requires information on demand, bills of materials, and safety stock levels as inputs. The master production schedule sets out planned production quantities over time based on market requirements. Bills of materials define what components are needed to make finished items. Inventory records track on-hand quantities. Dispatching and expediting are then used to schedule and monitor production progress by issuing work orders, tracking materials and labor, and resolving issues to complete jobs on schedule.

1. PRODUCTION SCHEDULING
UNIT - IV

2. MATERIAL REQUIRMENTS PLANNING (MRP)
 It converts master schedule in to a final product
INFORMATION NEEDED FOR MRP:
1. Demand for all products
2. Items for finished goods
3. Safety stock requirements
INPUTS TO MRP:
1. Master production schedule
2. Bill of materials file
3. Inventory record file

3. MRP STRUCTURE

4. 1. MASTER PRODUCTION SCHEDULE
1. Sale or distribution during specific period
 INPUTS TO MPS:
 Market requirements
 Production plan to aggregate planning
 Resources available
 BILL OF MATERIALS:
 How many, each of them used.
 INVENTORY RECORD FILE:
 Item master data segment
 Inventory status
 Subsidiary data segment

5. BENEFITS OF MRP
 Reduce inventory levels
 Reduce production lead time
 Improve product quality
 Better production schedule
 Better machine utilisation

6. DISPATCHING AND
EXPEDITING
 DISPATCHING
 Setting productive activities in motion
 Accordingly with previous planned time and
sequence

7. DISPATCHING ACTIVITIES
1. Movement of material from store
2. Issue of tool orders
3. Issue of job orders
4. Issue of time tickets
5. Issue of inspection orders
6. Issue of move orders

8. COMMON FORMS USED IN
DISPATCHING (8mark)
1. Material requisitions
1. Issuing material from store
2. No material issue without written requisitions
2. Job cards/ tickets
1. Worker identity for a material
2. Recording the production progress
3. Labour cards / tickets
1. It is knows as wage payment cards
2. Usually job and labour cards are combines

9. 4. Move cards/ tickets
1. Movement of material between operations
5. Inspection cards / tickets
1. Report the quantity of work passed / rejected
6. Tool and gauge tickets
1. To issue any tool under requirements

10. DISPATCHING RULES
1. FCFS (First Come First Serve)
2. SOT (Shortest Operation Time)
3. Earliest due dates
4. STR (Slack Time Remaining)
5. STR/OR (Slack Time Remaining per Operation)
6. CR (Critical Ratio)
7. QR (Queue ratio)

11. EXPEDITING
(PROGRESSING)
 Expediting:
 Also known as follow – up or progressing
 Plan till job is completed
 FUNCTIONS OF EXPEDITING:
 Status reporting
 Attending holds-ups
 Modifying the production plans
 Co-ordinating with purchase