Aggregate Planning, MRP, and Short Term Scheduling - PowerPoint PPT Presentation

Loading...

PPT – Aggregate Planning, MRP, and Short Term Scheduling PowerPoint presentation | free to download - id: 45e503-NjNhM



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Aggregate Planning, MRP, and Short Term Scheduling

Description:

Aggregate Planning, MRP, and Short Term Scheduling 9 Aug 2001 Introduction What Determine the quantity and timing of production for the immediate future Where ... – PowerPoint PPT presentation

Number of Views:404
Avg rating:3.0/5.0
Slides: 22
Provided by: GeoffK3
Learn more at: http://classes.uleth.ca
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Aggregate Planning, MRP, and Short Term Scheduling


1
Aggregate Planning, MRP, and Short Term Scheduling
  • 9 Aug 2001

2
Introduction
  • What Determine the quantity and timing of
    production for the immediate future
  • Where To meet forecasted demand
  • Why Minimize costs

3
The Planning Process
  • Aggregate planning ties strategic goals to
    production plans
  • Medium range 3 to 18 months
  • Requires
  • Measure of sales and output
  • Forecast of demand for the period
  • Method of determining costs
  • Model that combines forecasts and costs

4
Aggregate Plan Relationships
Marketing Customer Demand
Finance Cash Flow
Production Capacity Inventory
Human Resources Manpower Planning
Aggregate Production Plan
Procurement Supplier Performance
Engineering Design Completion
Management Return on Investment Capital
5
Capacity Options
  • Change inventory levels
  • Change workforce size
  • Change production rates
  • Subcontracting
  • Using Part-Time Workers

6
Demand Options
  • Influence demand
  • Back order during high demand periods
  • Counterseasonal product mix 

7
Strategies
  • Chase strategy
  • Level strategy
  • Mixed strategy

8
MRP Introduction
  • What Plan requirements for components
  • Where Where components of a product are known
  • Why Individual component needs are dependant on
    the aggregate plan

9
Dependant Inventory Model Requirements
  • Master Production Schedule
  • Bills of Material
  • Modular bills
  • Planning bills
  • Phantom bills
  • Accurate Inventory Records
  • Purchase Orders Oustanding
  • Lead Times for Each Component

10
Dealing With Changing Requirements
  • System Nervousness
  • Time fence
  • Pegging

11
Lot Sizing
  • Lot for Lot
  • Economic Order Quantity
  • Part Period Balancing

12
Extensions of MRP
  • Closed Loop MRP
  • Capacity Planning
  • MRP II

13
Short Term Scheduling Introduction
  • What Scheduling or timing of operations
  • Where Timing of operations affects the overall
    strategy
  • Why Reduce costs, improve response

14
Scheduling
  • Forward Scheduling
  • Backward scheduling
  • Scheduling criteria
  • Minimize completion time
  • Maximize utilization
  • Minimize work-in-process
  • Minimize customer waiting time
  • Objective Optimize resources so that production
    objectives are met

15
 Scheduling in Process-Focused Work Centers
  • Job shop, low volume, high variety
  • Schedule incoming orders without violating
    capacity constraints
  • Check availability of tools and materials before
    releasing an order
  • Establish due dates and check progress
  • Check work in progress
  • Provide feedback
  • Monitor work efficiency statistics

16
Loading Jobs in Work Centers
  • Input-output control
  • Gantt charts

17
Sequencing Jobs at Work Centers
  • Priority Rules
  • First Come, First Served
  • Shortest Processing Time
  • Earliest Due Date
  • Longest Processing Time

18
 Critical Ratio
  • Time Remaining / Workdays Remaining
  • Highest Critical Ratio is selected for processing
    next

19
Limitations of Rules
  • Scheduling is dynamic
  • Rules do not look upstream or downstream
  • Rules do not look beyond due dates 

20
Finite Scheduling
  • Computerized
  • Short Term
  • Graphical
  • Interactive

21
Constraints and Bottlenecks
  • Limit output in the production sequence
  • Increase capacity
  • Reroute work
  • Change lot size
  • Change work sequence
  • Accept idleness
About PowerShow.com