Anne Frank A Beacon of Hope amidst darkness ppt.pptx
Input to MRP
1. Branch : Mechanical 6-D-1
Prepared by:Dangar Shivji S.(1501231190016
Submitted to: Prof. Nilesh Gupta
Computer Aided DesignComputer Aided Design
(2161903)(2161903)
Input To MRP
2. MRPMRP
Material requirements planning (MRP):
Computer-based information system that translates
master schedule requirements for end items into
time-phased requirements for subassemblies,
components, and raw materials.
3. Overview of MRPOverview of MRP
MRP Inputs MRP Processing MRP Outputs
Master
schedule
Bill of
materials
Inventory
records
MRP computer
programs
Changes
Order releases
Planned-order
schedules
Exception reports
Planning reports
Performance-
control
reports
Inventory
transaction
Primary
reports
Secondary
reports
4. Master Production Schedule (MPS) – States which
end items are to be produced, when they are needed,
and in what quantities
Bill of Materials (BOM) – a listing of all of the raw
materials, parts, and sub-assemblies needed to
produce one unit of a product
Inventory Records – includes information on the
status of an item during the planning horizon, eg.
quantity, supplier, order lead time, lot size
MRP InputsMRP Inputs
6. 14-6
MPR Processing
Gross requirements
◦ Total expected demand
Scheduled receipts
◦ Open orders scheduled to arrive
Planned on hand
◦ Expected inventory on hand at the beginning of
each time period
7. MPR Processing
Net requirements
◦ Actual amount needed in each time period
Planned-order receipts
◦ Quantity expected to received at the beginning of the
period
◦ Offset by lead time
Planned-order releases
◦ Planned amount to order in each time period
8. 14-8
Updating the SystemUpdating the System
Regenerative system
◦ Updates MRP records periodically
Net-change system
◦ Updates MPR records continuously
9. 14-9
MRP Primary ReportsMRP Primary Reports
Planned orders - schedule indicating the amount
and timing of future orders.
Order releases - Authorization for the execution
of planned orders.
Changes - revisions of due dates or order
quantities, or cancellations of orders.
10. 14-
10
Requirements of MRPRequirements of MRP
Computer and necessary software
Accurate and up-to-date
◦ Master schedules
◦ Bills of materials
◦ Inventory records
Integrity of data
11. 14-
11
MRP in ServicesMRP in Services
Service applications such as:
◦ Professional services
◦ Postal services
◦ Retail
◦ Banking
◦ Healthcare
◦ Higher education
◦ Engineering
◦ Logistical services
◦ Real estate
12. Advantages of MRPAdvantages of MRP
Company Advantages Individual Advantages
Minimize Inventory
Accurate Information
Greater Responsiveness
to Market
Future Capacity Planning
Production
Planners/Managers
Plant Foremen
Customer Service
Representative
Purchasing Manager
Inventory Manager
13. Reliance on Information
Increased Material Costs
Hazard of Production Slowdown or Shutdown
Hazard of Stock Out
Doesn’t account for Plant & Distribution Capacity
Implementation Difficulties
Disadvantages of MRPDisadvantages of MRP
Advantages:
Inv – carrying costs – insurance, obsolete, theft
Material requirements – correct time and material can be allocated appropriately since known
Production Planner - balance work loads across departments and make decisions about scheduling work
plant foremen - for issuing work orders and maintaining production schedules
Customer Service Representative - supply customers with projected delivery dates
Disadvantages:
Increased Material Costs – transportation costs, unit costs
Reliance – missing parts, excessive order, delays, missed delivery date – must have at least accurate MPS with good lead time estimates, current inv records,
Implementation Difficulties – time, costs, resistance