Hong et al. report empirical evidence that arrivals in large service systems show over-dispersion (variance above Poisson), and state that under over-dispersion the square-root safety rule leads to understaffing.

Checked 2026-09-25

Vendor
vendor-neutral
Product
not restricted
Subsystem
agent staffing
Deployment
any
Region
not restricted
Release range
arXiv v3 2026-04-23
Checked
2026-09-25

Sources

Cite this note

APA

WarmTransfer. (2026, September 25). Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-arrival-overdispersion. WarmTransfer. https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-arrival-overdispersion

BibTeX

@misc{warmtransfer-claim-erlang-traffic-engineering-arrival-overdispersion,
  title  = {Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-arrival-overdispersion},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-arrival-overdispersion},
  note   = {Source note erlang-traffic-engineering-arrival-overdispersion, checked 2026-09-25}
}

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