Formulas Flashcards
order processing - cycle time
total processing time / total items processed
order processing - throughput time
work-in-progress * cycle time
effectiveness of a layout
F * D
F = the flow in loads or journeys per period of time
D = distance between work centres
capacity - utilization formula
actual outputs / design capacity
capacity - efficiency
actual outputs / effective capacity
overall equipment efficiency
a * p * q
a = availability of a process
p = the performance speed of a process
q = the quality of a product or service that the process creates
inventory - the frequency of deliveries = the reciprocal of the time interval
= D / Q
inventory - Economic order quantity
squared (2CD / H)
average inventory level
M/2 = Q(P-D)/2P
inventory - min cost of order quantity - EBQ
squared (2CD / H(1-D/P))
operations improvements - proportion defective
nro of defects / nro of processed things
operations improvement yield
1- proportion defective
improvements - defects per unit
nro of defects / nro of units processed
improvements - defects per opportunity
nro of defects / nro of units processed * nro of opportunities
improvements - defects per million
defects per opportunities (formula) * 10¨^6
