The groups were instructed to report technical problems faced during experiment operation.
To this end, in the groups’ data collection forms were placed appropriate fields in which the
groups should fill out with the problems’ description and their corresponding identification
and resolution times. The total time spent by each group to solve problems is summarized
in the “Problems” column in Table 1. This time was not deducted from the groups’ overall
time since technical problems may occur in any development process.