Formulas Flashcards
1
Q
Failure Rate percentage
A
(Failures / operating units) * 100%
2
Q
Failure Rate
A
failures / hours of operation
3
Q
Mean Time Between Failures (MTBF)
A
total operational hours / failures
repairable components
4
Q
Mean Time To Failure (MTTF)
A
total operational hours / failures
non-repairable components
5
Q
Availability
A
uptime / (uptime + downtime)
6
Q
Fault Probability
A
minor event
7
Q
Economic Order Quantity (EQ
A
Order Cost = Holding Cost SQRT(2 * D * S / H) D - units annually S - order cost H - holding cost per unit, per year (annual holding cost / units held)
8
Q
Annual Holding Cost
A
Average Demand * Holding Cost
9
Q
Holding Cost
A
annual Holding Cost / units held per year
10
Q
ReOrder Point (ROP)
A
(Lead Time * Average Demand) + Safety Stock
