Haute Lumière
Commerce · I.05 · MMXXVI · daylight
For the person working inside a gainshare arrangement — where a defined share of verified improvement returns to the people who created it. This chapter is the one that decides what lands in your statement, because a gainshare pays on verified improvement, and verification is a design problem solved in week one.
A gainshare has four parts: a baseline, a measure, a share and a verifier. Three of the four are decided by how the pilot was designed — before anybody worked a single hour differently.
So the arithmetic in Chapter I.05 is not background for you. It is the arithmetic of your own pay. Specifically:
φ decides whether a measured saving becomes money at all. A saving nobody's budget releases is a saving no scheme can distribute.None of these is a matter of fairness or goodwill. They are design decisions, they are made early, and you can ask about every one of them before the pilot starts. That is the whole of this workbook.
Exercise 1.1 — Interrogate the design (2 hours)
Take the scheme document and the pilot design, and answer these in writing. Where you cannot answer, that is the question to ask.
σ? The period-to-period standard deviation of the measure. If nobody can tell you, nobody knows whether your improvement is detectable.ρ = 0.5 carry the information of 4.5. A design that treats them as twelve is overstating its precision by 63 percent, and overstated precision cuts both ways.None of these questions is adversarial. Every one of them makes the scheme better for the firm as well. A scheme that pays out on a design nobody can defend is a scheme that will be withdrawn after the first contested result.
Exercise 1.2 — Find the step (1 hour)
This is the question that most often decides whether a year of work produces a statement with a number on it.
Ask: what has to fall for this saving to be banked? A person, a shift, a vehicle, a lease, a licence band, a contracted volume, a line on an invoice.
claimable = step × floor(saving / step)
saving 12 % of a shift -> banked 0 φ = 0.00
saving 55 % of a shift -> banked 0 φ = 0.00
saving 110 % of a shift -> banked 1 shift φ = 0.91
If your improvement is heading for 55 percent of a step, say so now, in month one, in writing. There are three good routes and all three are better raised early:
Raised in month one, this is a design improvement. Raised in month twelve, it is a dispute.
Exercise 1.3 — The appreciative interview (45 minutes)
Find someone who has been through a full gainshare cycle and ask:
"Tell me about a time the scheme paid out on something you were proud of. What made it possible to measure? What did somebody do early that made the payment straightforward later?"
Take notes on the design decisions, not the amount. People who have been paid properly remember exactly which decision made it possible, and it is almost always something settled before the work began.
Exercise 2.1 — Compute your own detectability (2 hours)
Do this for the measure your gainshare actually pays on.
σ.ρ and inflate σ.m (pre-periods in the baseline) and k (post-periods in the payment window).detectable effect = 2.8016 · σ · √(1/m + 1/k).Now compare it to the improvement you believe your team can make. If the improvement is smaller than the detectable effect, the scheme cannot pay you for it as designed, and that is a fact about the design rather than about your work.
Take it to the scheme owner with the three fixes, in this order: extend the baseline period (free, it is history); lengthen the measurement window; or add comparable units so there is a control arm. The first costs nothing at all.
Exercise 2.2 — Compute the realisation rate on your own line (90 minutes)
φ = banked saving / measured saving
Take last cycle's verified improvement, if there was one, and trace it:
φ is the ratio. If you cannot trace it, φ is unknown, and an unknown φ is where a scheme quietly stops paying while everyone continues to work.
This is the single most valuable number you can produce this month, and it is valuable to the firm too: a measured φ is what lets the next pilot be underwritten instead of argued about.
Exercise 2.3 — Check the baseline for ratcheting (1 hour)
Two things to establish, both in writing:
(1 − ρ) × distance from the mean on its own — about 0.51σ at the 10th percentile with reliability 0.6. Paying out on that is generous this cycle and indefensible next cycle, and schemes that pay on artefacts get closed.Argue for the control group. It is the one structure that protects the scheme's credibility and your payment at the same time, because it cancels the regression identically in both arms.
Exercise 2.4 — The honest negative, applied to you (30 minutes)
Write the strongest case against your own claim for this cycle. Not a straw version — the version that troubles you. Seasonality? A market movement? A co-intervention somebody else ran at the same time? A definitional change in the system?
Then bring it to the verification meeting yourself, before anyone else raises it.
The person who names the confounder first is the person whose remaining claim is believed. This is not a concession. It is the highest-return move available to you in the entire cycle.
Exercise 3.1 — The six asks (2 hours)
Six requests. Every one of them improves the scheme for the firm as well, which is why they are askable.
Ask for them as design questions, not as demands. Every one of the six is something a scheme owner will want on the day the first result is contested.
Exercise 3.2 — Contribute where the design says the gain is (1 hour)
Look at the claim map and find where a marginal hour of your effort moves a banked pound rather than a measured one. They are often different places.
Write three specific actions you can take this cycle that:
The third is not administration. An improvement the verifier cannot see did not happen, as far as the ledger is concerned, and the ledger is what pays.
Exercise 3.3 — Write the one page (45 minutes)
At the end of the cycle you want one page in the verification meeting that somebody who does not know you can read in ninety seconds:
Item four is the one that makes the rest believed.
Exercise 4.1 — Read the fund's arithmetic (30 minutes)
The gainshare and the pilot fund are the same instrument seen from two sides. The firm's version:
r = φ · S / C doubling = ln 2 / ln(1 + r)
φ 0.65 S 96,000 C 120,000 -> r = 0.52/yr doubles in 1.66 years
Yours is the same equation with your share in the numerator. Both halves grow from the same thing: a verified saving that lands in a named budget. That is why pressing for a clean design is not adversarial. It is the only version in which there is anything to share.
Learn to say the portfolio number too: p·φ·S / (C + V + A) = 27.7 percent against a 9 percent WACC, break-even at a 19.5 percent success rate. It is the sentence that keeps the fund funded, and the fund is what keeps the scheme alive.
Exercise 4.2 — The three failure modes, from the inside (1 hour)
Raise each once, concretely, with the fix attached, and then let it go. You are improving an instrument, not conducting an audit.
Exercise 4.3 — Delight, and why it belongs here (30 minutes)
The best moment in a gainshare cycle is not the payment. It is the verification meeting where the sceptical question has already been answered on page one, in writing, dated before anybody knew the result — and the room moves straight to what to do next.
The second best is the cycle after, when somebody in another team asks you for your one-page template. The method has stopped being yours. That is when it becomes how things are done here, and it happens without a mandate.
Write one sentence: the part of this I look forward to is ___. If you cannot complete it, the scheme has become a report rather than a practice, and that is worth raising.
σ and detectable effect for the measure that pays you.φ from last cycle, traced to a budget line.| Not yet | Beginning | Solid | Fluent | |
|---|---|---|---|---|
I can state σ and the detectable effect for the measure that pays me | ||||
| I know which budget line each of my savings falls out of | ||||
| I know what step my saving has to cross, and whether it will | ||||
| I have a dated copy of the pre-registered analysis | ||||
| I know the baseline term and whether it ratchets | ||||
| I name the confounders against my own claim before anyone else does | ||||
| I can explain the fund's regeneration rate to a colleague | ||||
| I ask design questions early rather than disputing results late |
The two that matter most are the third and the sixth. The third decides whether there is money. The sixth decides whether you are believed about it.