Please enable JavaScript.
Coggle requires JavaScript to display documents.
Production and ERP (8.5 Material requirements planning MRP-I (it is a…
Production and ERP
8.5 Material requirements planning MRP-I
The MRP-I consist of a set of formulas that can be used to calculate the future material requirement
maual planning was done with card index - Cardex - 1950
it is a forward coupled management system - push
dependent demand
time phasing
The planning horizon is devided into equal periods - buckets
Master production schedule - MPS
uses forecast and customer orders to generate a producion schedule
Batch
synchronized batch sizes
lot-for-lot
8.8 Theory of constraints TOC
Figure 8.15 Bottleneck
ECE analysis - Effect-Cause-Effect
analyzing
creating
implementing
choices in a bottleneck situation
the speed at which this process or machine generates money
the money that is invested in this process
the money that is needed to keep this process going
Goldratt three criteria
inventory
operating expenses
throughput
5 steps that have to be taken if the weakest link is to be srenghtened
make the rest of the system subordinate
4 reinforce the capacity
2 decide how you can exploit the bottleneck
5 once the bottleneck has been removed go back to step 1
1 identifying the constraint
8.1 Production models
Batch production
useally for special products
Convergent production
suplying compound products
Parallel production
no product relationship between flows
Divergent production
flow of goods fans out
8.6 Manufacturing resource planning MRP-II
Top down control system
S&OP - sales and operation planning
indicates the total volume that should be generated
MPS
CRP - Capacity requirements planning
8.7 JIT and kanban
TPS - the seven wastes - Taiichi Ohno
waste during operations
waste by holding inventory
waste by transporting of parts
waste due to superfluous motions
wasted machine time
waste due to faulty parts
overproduction
Kanban - card or label
production kanban
transport kanban
Kaizen umbrella Figure 8.14
continious improvement is the foundation of Japanese succes
8.3 Functional layout
Figure 8.6
similar operations are clustered in one department or group
Batch - products flow through production together
8.2 Continuous production
no build-up stock (continious)
French fries
assembly line
Model T Ford
8.4 Manufacturing in groups
Figure 8.7
The production can be dedvided into autonomous groups, often called production cells
8.9 Enterprise resource planning ERP