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Published method

AHT Decomposition: formulas, assumptions and a worked example

How AHT Decomposition splits handle time into its components, models the initiatives a buyer is weighing as shares of those components, and turns seconds saved into agent hours of capacity.

Method version 1.0, published 2026-09-24.

What each number is

Handle time, each component's share and the time outside the conversation are arithmetic on your inputs. Every lever share is an assumption, labelled as a heuristic until you replace it. The handle time after a lever and the agent hours it frees are conditional forecasts under those shares. Agent hours are capacity; they become cash only through an action you choose.

Formulas

Handle time

Talk + hold + after-call work + transfer + knowledge search + system time

Each component in seconds a contact.

Outside the conversation

Handle time − talk time

A fact about where the seconds go. Whether any of it can come out depends on the initiative and the operation.

One lever

Seconds saved = the sum over its targets of component × share removed

Each lever alone, against today's handle time.

Selected levers combined

Each component × the product over selected levers of (1 − share removed)

Two levers on the same component each remove their share of what the other leaves, so no second is counted twice and no component goes below zero.

Agent hours a year

Seconds saved × contacts a month × 12 ÷ 3,600

Capacity. The Staffing Calculator turns handle time into agents at your service level.

Rules and bands

Automatic call summaries · 50% of after-call work

Opening share, editable, counted only when selected.

Knowledge surfaced in the contact · 40% of knowledge search and 15% of hold time

Opening share, editable, counted only when selected.

One agent desktop · 50% of system time and 10% of hold time

Opening share, editable, counted only when selected.

Right agent first time · 50% of transfer time and 5% of talk time

Opening share, editable, counted only when selected.

The levers and their opening shares. No published study gives these shares for an operation; each is a planning heuristic to be replaced with a vendor's evidence or your own pilot.

Every constant and where it comes from

0.5 share of the component removed · Heuristic, no published source

After-call work removed by automatic call summaries and disposition.

0.4 share of the component removed · Heuristic, no published source

Knowledge search time removed when answers are surfaced during the contact.

0.15 share of the component removed · Heuristic, no published source

Hold time removed when agents stop placing customers on hold to look things up.

0.5 share of the component removed · Heuristic, no published source

System and admin time removed by bringing the agent's applications into one desktop.

0.1 share of the component removed · Heuristic, no published source

Hold time removed when fewer holds wait on application switching.

0.5 share of the component removed · Heuristic, no published source

Transfer time removed when contacts reach the right agent first.

0.05 share of the component removed · Heuristic, no published source

Talk time removed when the first agent reached can resolve the contact.

Worked example

Computed by the tool's own engine at its default inputs, so this page and the calculator always agree.

Components: talk 210s, hold 55s, after-call work 60s, transfer 15s, search 30s, system 25s

Contacts per month: 20,000

Levers: all four selected at their opening shares

Handle time

210 + 55 + 60 + 15 + 30 + 25 = 395s, of which 185s (47%) is outside the conversation

Automatic call summaries

60s × 50% = 30s a contact

Knowledge surfaced in the contact

30s × 40% + 55s × 15% = 20.3s a contact

One agent desktop

25s × 50% + 55s × 10% = 18s a contact

Right agent first time

15s × 50% + 210s × 5% = 18s a contact

Hold time with both hold levers

55 × (1 − 15%) × (1 − 10%) = 42.1s, 12.9s removed, less than the 13.8s the two shares would add to

Selected levers combined

395s falls to 309.6s, 85.4s a contact (21.6%)

Agent hours a year

85.4 × 20,000 × 12 ÷ 3,600 = 5,695 hours of capacity

What this tool cannot tell you

  • Components are averages. Handle time varies by contact type, agent tenure and time of day; decompose by queue where your data allows.
  • The lever shares are heuristics. A share you cannot evidence from a pilot or a reference site is a hypothesis to test.
  • Shorter handle time can move other measures. Watch repeat contacts and quality when talk or hold time falls.
  • Agent hours are capacity. They reduce cost only through an action such as fewer hires, less overtime or absorbed growth.
Open the AHT Decomposition
How to cite

The Center of CX, "AHT Decomposition method", version 1.0, 24 September 2026, https://www.contactcentercx.com/methodology/aht-decomposition