ABSTRACT
Project scheduling can involve several people, computers and specialized applications, a considerable amount of decision-making and a great deal of logical thought. Maintaining project schedule technical integrity is the process of eliminating mistakes and unwise scheduling choices so that the schedule remains valid and practical throughout the project lifecycle. A common source of open ends is input errors, when data are being typed into the computer keyboard. Project scheduling software will allow start or finish dates to be imposed on activities. The use of these imposed dates invariably overrides the natural results of a forward and backward pass and will usually compromise the calculation of early and late start and finish dates, float and the critical path. Competent project software should provide access to the system at a range of levels, specified so that only project planning professionals working on the particular project are allowed to change the network logic or declared quantities.
