About this piece
Nobody tells you upfront that your biggest obstacle in UAT is a shared Outlook calendar.
Why is scheduling so difficult in UAT?
Business users are your testers, and they have no testing responsibilities in their formal job description. Their managers prioritize their regular work. So when you need four regional sales managers in a room for three hours to test an order entry system, you are competing with quotas, client calls, and quarterly reporting. The testing window rarely moves for them.
How do experienced coordinators manage this?
They identify a single point of contact per business unit rather than coordinating with each user individually. That contact handles internal scheduling and reports back. This cuts coordination overhead significantly and puts accountability on someone with existing authority in their team.
What happens when testing gets delayed because of scheduling gaps?
Gaps compress the defect resolution window. If testing finishes one week late, the development team has less time to fix and retest before the go-live date. Coordinators who understand this pressure the schedule from the start rather than treating delays as minor. Keeping a simple shared log of session attendance versus planned attendance, updated daily, makes the impact visible to project sponsors faster than any status report.