Model 2. Suppose that after creating an invalid schedule, the scheduler returns to the position in the schedule at which the mistake was made, corrects the error, and continues.
For more detail, see The return on investment of computerized scheduling and staffing, which is a PDF document. If you are unable to view PDF, you should go to the Adobe Acrobat Reader download page. Alternatively, you can download a Maple version, but this is probably only useful to those with version 5 or better of the Maple mathematics package.
Two other pages on this site are A comparison of real option valuation with traditional methods and a summary of "Marketing automation meets the capital budgeting wall". These two pages are cover the problems of valuing information technology (such as scheduling systems). If you wish, you can also see the resume, transcript, or home page of the author of these pages.