Mater Production Scheduling (3) Could a MPS be changed?-Flexibility of MPS The flexibility with a MPS depends on the following factors: Production lead time; Commitment of parts and components to a specified end items Relationship between the customer and vender, Amount of access capacity;and Reluctance and willing of management to make changes Time Fences are defined as periods of time having some specified level of opportunity for customer to make change Time fences are introduced to maintain a reasonable controlled flow through the production system. 上济充通大学
Mater Production Scheduling (3) Could a MPS be changed?-Flexibility of MPS • Time Fences are defined as periods of time having some specified level of opportunity for customer to make change • Time fences are introduced to maintain a reasonable controlled flow through the production system. • The flexibility with a MPS depends on the following factors: • Production lead time; • Commitment of parts and components to a specified end items • Relationship between the customer and vender, • Amount of access capacity; and • Reluctance and willing of management to make changes
Mater Production Scheduling (4) Each company may have its Frozen Moderately Flexible own time fences and operating firm rules Frozen:absolutely no change could be made in a firm,or the most minor changes may be allowed in another. Firm customer Moderately firm:some orders changes to specific products within a products group so long as parts are available 8 16 26·1 Weeks Flexible:almost an variations in products are allowable, providing that capacity Figure 4.2 MPS Time Fences remains about the same and that there are no long lead time items involved. 上泽充鱼大粤
Mater Production Scheduling (4) 8 16 26 Capacity Frozen Moderately firm Flexible Firm customer orders Weeks Figure 4.2 MPS Time Fences • Each company may have its own time fences and operating rules • Frozen: absolutely no change could be made in a firm, or the most minor changes may be allowed in another. • Moderately firm: some changes to specific products within a products group so long as parts are available ; • Flexible: almost an variations in products are allowable, providing that capacity remains about the same and that there are no long lead time items involved
Chapter 7 Production Planning Contents ·Introduction Master Production Scheduling (MPS) Material Requirement Planning (MRP) ·Capacity Planning ·Improvement in MRP 上游充道大粤
Chapter 7 Production Planning Contents • Introduction • Master Production Scheduling (MPS) • Material Requirement Planning (MRP) • Capacity Planning • Improvement in MRP
MRP-Overview MRP create schedules identifying the specific parts and materials required to produce end items planned by MPS; The exact numbers needed;and The date when orders for these materials should be released and be received or completed within the production cycle. The main purpose of MRP are to control inventory levels,assign operating priorities for items,and plan capacity to load the production system. Inventory-Order the right part in right quantity at the right time; Priorities-Order with right due date;keep the due date valid; Capacity-Plan for a complete load,an accurate load,or for an adequate time to view future load. 上泽哀鱼大姿
MRP-Overview MRP create schedules identifying • the specific parts and materials required to produce end items planned by MPS; • The exact numbers needed; and • The date when orders for these materials should be released and be received or completed within the production cycle. The main purpose of MRP are to control inventory levels, assign operating priorities for items, and plan capacity to load the production system. • Inventory-Order the right part in right quantity at the right time; • Priorities-Order with right due date; keep the due date valid; • Capacity-Plan for a complete load, an accurate load, or for an adequate time to view future load
MRP-Overview Philosophy MRP-Materials should be expedited (hurried)when their lack would delay the overall production schedule. The main advantages of MRP Ability to price more competitively; 。 Reduced inventory; Reduced price; Better customer service; 。 Better response to market demand: Ability to change master schedule; Reduced setup and tear-down costs; Reduced idle time; 上浒充鱼大
MRP-Overview Philosophy MRP –Materials should be expedited (hurried) when their lack would delay the overall production schedule. The main advantages of MRP • Ability to price more competitively; • Reduced inventory; • Reduced price; • Better customer service; • Better response to market demand; • Ability to change master schedule; • Reduced setup and tear-down costs; • Reduced idle time;