Glossary Phone system
What is Call queue?
Also called acd, automatic call distribution, hold queue
A call queue holds inbound callers when every agent is busy and hands them out as agents free up. The distribution logic is often called ACD, Automatic Call Distribution. Unlike a ring group, a queue is designed around the assumption that waiting is normal and needs managing rather than avoiding.
Making the wait bearable
Two things reduce abandoned calls more than anything else: telling people their position in line, and offering a way out that is not hanging up, such as a callback that keeps their place. Both work because the frustration of holding is mostly uncertainty. Silence is the worst possible hold treatment, since callers assume they have been cut off.
The numbers worth watching
Average speed of answer tells you how long people wait. Abandonment rate tells you how many gave up, and is the one that correlates with lost business. Service level, the share of calls answered within a target time, is the usual target because it captures both. Average handle time is useful for staffing but dangerous as a target, since it rewards rushing people off the phone.
Staffing to a service level
Queue performance is arithmetic more than effort. If calls arrive faster than agents can handle them, no amount of urging will fix it, and the queue simply grows until people abandon. The useful exercise is to compare arrival rate against handle time and agent count for each hour of the day, which usually shows that the problem is concentrated in two or three predictable peaks rather than spread evenly. Fixing coverage in those specific hours is far cheaper than adding headcount across the board.