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8/13/2019 Spchain Notes 3sup
1/1
It is important for managers to realize that how they run items using
inventory control logic relates directly to the fin. Perf. of the firm.
Price-break models deal with the fact that, generally, the selling price of an
item varies with the order size.(EOQ) Q = Sqt of 2*D*S / I *CAggregate value of inventory = (order quantity/2+safety stock)* cost perunit
Compute weeks of inventory
Units held / units used each week
If a company has 50 units and they use 10 units a week, they
have 5 weeks worth of inventory
K = expected demand during lead time + safety stock / size of container or
DL(1 + S)/ CK= # of Kanban card sets D = avg. # of units demanded per period L = lead
time to replenish order S = safety stock as a % of demand during the lead
time C = container size
TCO= acquisition costpurchase planning cos.quality cos/tax/purch
p/fin.cost + ownership costenergy
co/maintaince&repair/fin/suplychain/suply netw +post-ownership
costsdisposal environmental co/warranty cost/product
liability/customer dissatistification cos ts.
Flexible resources-study op&imp. Operation/general purpos machine
Total people inv.labor is to clos to action/rethink perf measurr/resp at so
Visibility- posted schd/strict lim in inve/layout/communicat/charts,logs
Preautomation-attain results without exp/system analys/elem. Wst pross
Cellular layouts-group dissmilar machines in manufac/workflow 1
dir/cycle time adj by workers path
Pull production system-
Kanban production control-Kanban card indicates stand quantity of
prod/Derived from two-bin inv. Sys/ Kanban maintains discipline of pull
prod/Prod. kanban authorizes production.
Withdrawal kanban authorizes movement of goods
Small-lot production-Req. < space and cap./Move proc. Closser/quality
problems easy to detect.Quick setupsSMED System-separate int setup from ext setp/convert
int stp to extern stp/steam line all the aspect of stp/ perf stp activit parall
OED/IED/SMED/OTED
Uniform production-PROD. Littl bit of evrthing. Daily/smotth production/
Quality at the sourc-jidoka/andon/pokayoka/visual control makes prob vi
Total prodctiv maintc-braikdown maint/ prevent maint
Sole sourcing
Continuous improvement./Requires total employment
involvement/Essence of JIT is willingness of workers to: Kaizen Spot quality problems/Halt production when necessary
Generate ideas for improvemen/Analyze problems
Perform different functions
Constraints-dont ship more than you have/ you cant have negat cost.
No lower than 0/needs to be= to amount demanded