The most common forecasting mistake is relying solely on historical volume patterns without accounting for known future changes like product launches, marketing campaigns, or seasonal shifts. Planners frequently underestimate shrinkage - the gap between scheduled and actually available agent time due to breaks, training, and absence - leading to staffing plans that look adequate on paper but fail in practice. Forecasting at too coarse a time granularity misses the intraday volume swings that drive actual service level performance. Treating each channel's forecast in isolation, rather than accounting for how digital and voice volume interact, produces staffing plans misaligned with actual omnichannel demand patterns. Failing to continuously validate forecast accuracy against actual outcomes prevents the iterative improvement that produces increasingly reliable predictions over time.
Common Mistakes