A key factor in the management of software projects is the ability of the m
anager to handle delays in the hiring and assimilation of staff. This study
examines how decision makers cope with staffing delays, and how their deci
sions affect the outcome of software projects. We report the findings of a
laboratory experiment in which subjects managed a simulated software projec
t that entailed delays in the hiring and/or assimilation of staff. The perf
ormance of the subjects was ascertained in terms of the cost incurred and t
ime taken in completing the project, While decision makers performed poorly
in the presence of delays in either hiring or assimilation, subjects who h
ad to deal with delays in the assimilation of staff performed worse than th
ose dealing with hiring delays. Subjects who had to contend with both hirin
g and assimilation delays performed considerably worse than those who had t
o cope with just one type of delay. We suggest process explanations for the
results, and discuss the implications of the results for managing software
projects.