Construction and application of robustness indicator for project schedules
The evaluation of the project schedule's robustness is important and difficult in the study of robust scheduling for the project with uncertainties.Given this,a robustness evaluation indicator is designed in this paper.Firstly,the stochastic characteristics of activities within the project constraints are analyzed,and the probability of activity starting time is derived by deconstructing the relationship between activity procrastination and postponement.Then,the loss incurred by uncertainties is described as deviation cost,the expected value of which is deduced by an approximation method and used as a measure of the schedule's robustness.A settable parameter is introduced in the indicator.The precision and simplicity of the indicator can be weighed by adjusting the parameter,which improves the flexibility of the indicator in practical applications.Finally,the experiments show that the new indicator can accurately reflect the schedule's robustness and improve the performance of robust scheduling algorithms compared with the traditional ones.
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