This information is part of the Business Simulation Library (BSL).
Fatigue is modeled as a smooth of the normalized input u which is indicating the current workload with regard to capital equipment or workers. The current workload will be normalized by dividing the input u by a constant or a variable reference workload (
u_ref, respectively). The
timeToGetFatigued describes the time constant for the smooth and indicates the lag between beginning to work at an excessive level and the onset of the full effect on productivity (or quality).
Janoscheks growth curve is used to model the nonlinear effect of a prolonged work intensity. It describes a negatively sloping s-shaped curve that will pass through the reference point (1,1). The upper bound of the effect (
effectMax) must be given slightly above 1.0 as the curve will collapse in all other cases. If the effect is to be clipped at 1.0 then the parameter
clipEffect should be set to
hours worked per month,
output per houretc.).
initin the Advanced tab allows to select →InitializationOptions:
initialFatigueto determine the initial output of the smoothed, normalized workload.
initialFatigueas an initial guess.
Type: Time (s)
Description: Time constant for the exponential smooth of overtime in periods
Type: Rate (1/s)
Description: Constant reference workload (optinal)
Description: Delay order of the smooth for workload
Description: The upper bound for the effect of less work than normal on PDY (MAX >= 1)
Description: The lower bound for the effect of fatigue on PDY (MIN >= 0)
Description: High values indicate a steep gradient for the lookup curve (JanoschoekNegative.growthRate)
Description: = true, if the reference workload is given by a constant parameter
Description: = true, if the maximum effect is to be 1.0
Description: Initial Output (fatigue.initialValue)
Description: Provide InitializationOptions (Free, FixedValue, SteadyState)
Description: = true, if strict limits with noEvent(..) (clippedEffect.strict)
Description: Workload divided by the normal workload
Description: Constant reference value for the workload (optional)
Description: The multiplicative effect of fatigue on productivity or quality
Description: Fatigue is an n-th order smooth of overtime
Description: Clip Effect to only allow values within the closed unit interval
Description: Leave the effect unchanged