TKEG is a corporate service firm that manages 112 companies across 20 jurisdictions, and our hiring runs on a portal we built. We did not do the migration while the system was under load; we waited until the queue was the thinnest. After that, the volume came back onto the new system. This is about the recruiting side—our applications and hiring process—instead of payroll or benefits.
And there are two decisions that did most of the work. 1. Timing: we ran the bulk load from Monday.com on 5 May 2024, a month which recorded only 17 applications of all types, and that was our lowest month at that time. June was 69 and July was 460. Therefore, the new system carried the real volume. 2. Sequencing: we moved the data first and the process second, and 9,158 application records went across in one day, carrying the full history back to March 2021 instead of only open cases, with a second wave of 275 records on 16 June, mostly back-dated. Our new hiring stages were not written until 23 June, seven weeks after the load. What we did badly: the 13 applications which arrived after the load were only entered on 13 June.
For time-saving, I'd recommend to keep the old system's numbering. Every application had a number in Monday.com; we kept that exact number on the record, and our system carried on counting from the next one; therefore, nothing was renumbered, and no record was orphaned.