LensReading which lens this session carries.

Cost at the unit

Which cost is the cost

The estate publishes four different weekly costs to serve and they span $12.59m.

Four costs, one estate

Each prices a different population with a different rate method · spread $12.59m a week

Four costs, one estate.

The tower rollupquote this
$9,075,562 a week
Annualized
$471.93m
the week times 52
Population
900,433
transactions a week
Implied unit
$10.08
Volume times cost per transaction, summed across 12 towers.

It prices Every document the shared services estate carries, once, at the tower that carries it.

Why this one — It counts every document once, at the tower that carries it, so it has no double count to unwind and no selection to defend. It is the only one of the four whose population is the same object the operations pages, the queue and the film all count.

Open the tower estate
The sub-function rollup
$15,449,732 a week
Annualized
$803.39m
the week times 52
Population
1,463,698
work units a week
Implied unit
$10.56
Volume times cost per unit, summed across 154 sub-functions.

It prices Every unit of work the functional organisation counts, which is not the same object as a document.

Why it is not the one to quote — It double counts. A single purchase order is a unit in sourcing, a unit in payables and a unit in the ledger close, so the same document is priced up to three times. The population it prices is 1.63 times the document population, which is the size of the overlap, not new work.

Open the function map
The spend ledger
$7,138,537 a week
Annualized
$371.20m
the week times 52
Population
54
booked spend lines in the quarter
Implied unit
$7.93
The latest complete quarter on the ledger, 2026-Q2, divided by thirteen.

It prices What was actually booked to a cost center. It is the only one of the four that a finance system would recognise.

Why it is not the one to quote — It is incomplete by construction. It carries what was coded to these cost centers, and the work the towers do is not all coded there: shared platform, allocated management and anything absorbed inside a business unit never reaches the ledger lines. It runs 21.3 percent below the tower rollup for that reason.

Open the rate card
The priced sample, scaled
$2,855,902 a week
Annualized
$148.51m
the week times 52
Population
1,750
assembled chains priced line by line
Implied unit
$32.64
The full priced sample divided by the two percent sampling rate.

It prices Only the outcome chains that could be assembled end to end from evidence. It is the most rigorously costed of the four and the least representative.

Why it is not the one to quote — It prices the work that assembles cleanly. Work that could not be assembled into a chain is not in it at all, which is exactly the expensive, broken work you would most want priced. Scaling it up multiplies that selection bias by fifty.

Open cost per outcome

Annualized figures are the weekly figure multiplied by fifty two.

Published volume against the daily ledger

900,433 published · 921,379 on the ledger year average · gap +20,946 (+2.3%)

The towers publish a weekly transaction count. The daily ledger carries 52.1 weeks of arrivals. Those two numbers had never been set against each other in one place, which is what let the deep week and the published week be quoted interchangeably. They are not the same number and they were never meant to be: the published week is the ledger year average, not the deep week. Read that way, 10 of 12 towers agree within one percent. 2 towers carry +22,020 of the +20,946 total gap between them; everything else nets to −1,074, which is 0.12 percent of the estate and is rounding, not a finding.

TowerPublished a weekLedger deep weekLedger year averageGap to publishedGap
R2RRecord-to-Report Tower87,51281,990103,427+15,915+18.2%
O2COrder-to-Cash Tower107,54999,410113,654+6,105+5.7%
H2RHire-to-Retire Tower126,636113,910126,336−300−0.2%
ITSIT Service Tower85,27783,50585,025−252−0.3%
A2LAwareness-to-Lead Tower51,15647,15850,943−213−0.4%
C2LConcept-to-Launch Tower51,43846,26951,243−195−0.4%
S2PSource-to-Pay Tower142,093125,988142,260+167+0.1%
AIOAI Operations Tower68,45661,55068,327−129−0.2%
D&AData and Analytics Tower33,39730,61933,275−122−0.4%
LGLLegal Operations Tower40,63037,26040,587−43−0.1%
P2PPlan-to-Perform Tower25,19423,16325,211+17+0.1%
M2DMake-to-Deliver Tower81,09571,52681,091−4−0.0%
All towers900,433822,348921,379+20,946+2.3%

The deep week column is the seven days the operations pages sample.

Banked against forward

What the change has already taken out, and what is left to take

The two are different in kind, and the difference matters more than either figure. $18.85m a week is banked: the towers already run at $9,075,562 against a stated before of $27,926,042. $184k a week is forward: it does not exist yet, it needs $4.00m of build to obtain, and it pays that back in 21.7 weeks. Forward is 0.98 percent of banked. The honest reading of that ratio is not that the remaining work is worthless. It is that this estate is close to its modeled ceiling, and the next dollar is far harder to find than the last one was.

Decomposable candidates78
Worth building, gross saving67 · $206,517
Run cost the build adds back−$22,341
Net a week$184,176
Judged not worth building6
Already at their ceiling5
Cannot be decomposed at all76
Open marginal autonomy

If inference costs more than modeled

Inference is 21.0 percent of the unit cost · break even at 10.91 times the modeled price

Every cost on this platform rests on one modeled input nobody here has metered: the price of inference. It is $1.90m a week, $98.92m annualized, and 21.0 percent of what a document costs to carry. If that price is wrong the case does not collapse, it degrades, and it degrades slowly. The case only fails when inference costs 10.91 times the modeled price, at which point the estate costs exactly what it did before. That is the one sensitivity worth arguing about, so it is published rather than buried.

0.5× 0.5 times the modeled price$9.02 a document
$8,124,386 a week · $422.47m annualized70.9 percent below the before
1× as priced today$10.08 a document
$9,075,562 a week · $471.93m annualized67.5 percent below the before
2× 2 times the modeled price$12.19 a document
$10,977,913 a week · $570.85m annualized60.7 percent below the before
5× 5 times the modeled price$18.53 a document
$16,684,967 a week · $867.62m annualized40.3 percent below the before

The before is held constant across every row.

The spend ledger, quarter by quarter

Latest complete quarter 2026-Q2 · 2026-Q3 is open and is not used

The weekly spend figure above divides the latest complete quarter by thirteen. The most recent quarter on the ledger is still open and runs well below its predecessors for that reason alone. Quoting it would understate the ledger by about a quarter, so it is shown here and excluded from the comparison.

2026-Q3open, partial$69,119,124
2026-Q2$92,800,980
2026-Q1$84,840,506
2025-Q4$74,615,658
2025-Q3$62,961,389

What this page settles and what it does not

Read before quoting anything above

Settled
  • Which of the four costs to quote, and why the other three are not it.
  • Whether the published weekly volume is the deep week or the year average.
  • How much of the volume gap is attributable to named towers, and how much is residual.
  • Whether the saving is banked or forward, kept apart rather than added together.
  • How wrong the inference price can be before the case fails.
Not settled
  • None of these four is measured at source.
  • The before is asserted. No system here observed the estate at $27,926,042 a week.
  • The two towers outside tolerance need a data owner to say which of the two counts is right.
  • The spend ledger and the tower rollup will not converge until shared platform and allocated management are coded to the towers.

Actions

What is waiting on a person

Each count below is a place where the estate publishes a number it cannot yet defend as a measurement.

Operations

What this desk is allowed to start

A surface that only reports is not operable.

Trigger and bound

This page can set the four published costs to serve beside each other with the population and unit cost each implies, name one of them as the number to quote and record why the other three are not, reconcile published volume against the daily ledger tower by tower, keep banked saving apart from forward saving, and show how far the modeled inference price can move before the case fails.

Live observability

What the record shows right now

Every tower by whether its published weekly volume reconciles to the daily ledger year average, an exhaustive partition of all 12 towers …

Current distribution

12 towers

Agree within one percent1083%
Outside tolerance217%

Is policy and strategy coming to fruition

Whether the written intent is holding here

One cost is now named: $9.1m a week, $471.9m annualized, $10.08 a document, with the other three still published and each carrying a written reason it is not the one.

Holding on the record

The position this page exists to test is that an estate which publishes four different costs to serve has not measured its cost to serve at all, and that naming one of them is worth more than showing all of them.