Mark, David, Tia, and Ashley are team members in a computer programming class. they have been assigned the task of creating a computerized payroll system. Mark and tia worked very hard and created programs that worked well. David and Ashley, however, did not work as hard as they could and created programs with numerous errors. This resulted in payroll system which could not be implemeted. The team's poor performance that was a results of David and Ashley not doing their best can be termed as ______________.