Customer Service Staffing and Capacity Plan

Shrinkage is the percentage of paid time during which an agent is unavailable to handle customer inquiries due to activities like breaks, meetings, training, or sick leave. Standard industry shrinkage typically ranges from thirty to thirty-five percent. Factoring this into your plan ensures you recruit enough staff to cover these inevitable gaps without failing your response targets.

Email capacity is calculated using linear processing math based on daily ticket volume and average handle time since responses are asynchronous. Live chat requires an Erlang C queuing model because agents must handle multiple concurrent sessions in real-time. Your plan must separate these channels to avoid understaffing your live channels during sudden traffic spikes.

You should review and update your capacity model monthly to compare actual volume against your projections. Major revisions should occur quarterly to adjust for changing product launches, marketing campaigns, or shifts in customer behavior. This regular cadence prevents unexpected staffing shortages and keeps your hiring budget accurate.

Standard staffing math simply divides the total workload by shift hours, which assumes a perfectly steady flow of incoming work. Erlang C is a queuing algorithm that accounts for random arrival times and waiting line dynamics to ensure you have enough agents to answer live chats or calls within a specific number of seconds. Using Erlang C prevents long customer hold times during peak hours.