Automatic creation of countermeasure plans against process delay: creation of countermeasures based on holiday work

The authors have been developing the automatic scheduling systems for software development project, which deliver scheduling and worker assignment. Their earlier works were designed to draw on crashing and fast tracking to produce countermeasure plans against process delay. However, process delay can be recovered not only by crashing or fast tracking but also by using holiday works. Their earlier works did not take holidays into the considerations as a constraint, and supposed that the holiday works were unassignable because the holidays were considered to be an unchangeable object (from application perspective) and were treated implicitly. In this paper, the authors consider the holidays as a constraint against worker assignable days, and treat explicitly handle them. Therefore this paper proposes a mechanism for producing countermeasure plans by using holiday works, and proves that the proposed mechanism is effective in producing countermeasure plans stated above.