"Until recently, we used a well-structured Excel file for planning corona staff in our region, In the initial phase with one test street, we were able to work well with that. The sharp increase in activities such as the GGD's test lanes, bco's and other corona tasks, and thus the increase in the number of employees, made planning in Excel too laborious and prone to errors. The puzzle became too complex. We wanted to get rid of requesting and processing availability by e-mail and making manual changes in various tabs in Excel. Also, e-mailing print screens of work schedules via e-mail to all employees, is now thankfully a thing of the past."