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SCM 372 Exam 2 Formula Sheet
Required cycle time =
C
= (Production time per period) / (Required output per period)
Theoretical minimum number of work stations =
; where
T
is the sum of the task times
and
C
is the required cycled time
Line Balance efficiency =
; where
N
a
is the actual number of work stations
Capacity Utilization = (Capacity Used)/(Best Operating Level)
Expected Value =
where
p
i
is the probability of event
i
and
v
i
is the value of event
i
Forecast using Simple Moving Average:
where
A
i
is the actual demand during period
i
and
n
is the number of periods
Forecast using Weighted Moving Average:
such that
where
w
i
is the weight applied to period
i
Forecast using Exponential Smoothing:
where
α
is the smoothing constant
Forecast including Trend =
Where
F
i
is the forecast for period
i
and
T
i
is the trend component for period
i
, where
α
is a smoothing constant
, where
β
is a smoothing constant
Mean Absolute Deviation =
Running Sum of Forecast Errors =
Tracking Signal =
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 Fall '11
 COOK
 Regression Analysis, Mean, Errors and residuals in statistics

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