The Erlang-A queue (M/M/c+M) adds exponential customer abandonment at rate theta to the M/M/c model; with theta set to zero it becomes the Erlang-C queue.
Checked 2026-09-25
when one sets the abandonment parameter θ=0, we shut off the abandonment process and we obtain the Erlang-C queue
- Vendor
- vendor-neutral
- Product
- not restricted
- Subsystem
- agent staffing
- Deployment
- any
- Region
- not restricted
- Release range
- arXiv v1 2023-08-09
- Checked
- 2026-09-25
Sources
- The Number of Overlapping Customers in Erlang-A Queues: An Asymptotic Approach — arXiv (Ko, Pender, Xu) · tier 4 archived vendor documentation · Section 2 (model definition)
Cite this note
APA
WarmTransfer. (2026, September 25). Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-erlang-a-reduces-to-c. WarmTransfer. https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-erlang-a-reduces-to-c
BibTeX
@misc{warmtransfer-claim-erlang-traffic-engineering-erlang-a-reduces-to-c,
title = {Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-erlang-a-reduces-to-c},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-erlang-a-reduces-to-c},
note = {Source note erlang-traffic-engineering-erlang-a-reduces-to-c, checked 2026-09-25}
}