Roll-in
Although we were now 3 months behind the original schedule, there was considerable pressure from the business to still go live on the original target date - April 2002.
Our original model of rolling in remaining payrolls iteratively was clearly not feasible:
 | we would have to bring in 2 or 3 sites each month with no provision for any contingency |
| the overhead incurred in configuring, testing and signing off each phase of PeopleSoft development simply did not allow enough time |
| managing business transition on a monthly basis would require a full-time dedicated team |
| regression testing would be required every month and would have proved prohibitively expensive |
| the operational (live) payroll would be risked each month |
| ....... probably numerous other reasons as well!!! |
We, therefore, completely re-planned for a 'big bang' implementation with a single phase of PeopleSoft development, a single business transition plan, a single testing strategy and only one risk of impacting operational payroll.
Despite some extremely hairy moments, and with a lot of dedicated, hard work from the team of about 25 people, combined with a lot of innovative thinking ("out of the box thinking" became our catch phrase), we managed to pull it off with a full UK Payroll run for the first time on 17th April 2002.