1. What you will learn
This lesson opens Reader I by turning the programme's outcome into a diagnostic of where your business stands today. You will learn to define the outcome you want in ninety days, score your business on a handful of simple dimensions, and pick the single constraint that most limits you right now.
2. The idea explained
Before a doctor prescribes anything, she asks questions and measures. A business owner who plans without diagnosing is prescribing blind. A diagnostic is nothing mysterious: it is a short, honest scoring of the main parts of your business so that you can see which part is weakest and therefore where effort will pay off most. The idea borrowed from operations thinking is that at any moment one constraint limits the whole, and improving anything else changes little until that constraint moves.
Start with the outcome, because a diagnostic without a destination is just a mood. An outcome is a change in the business you could observe in ninety days, such as collecting from customers within a shorter time, signing a certain number of repeat buyers, or knowing your true margin per product. State it in a sentence with a number and a date. It should be ambitious enough to matter yet small enough that you could plausibly influence it, because outcomes that depend on luck teach you nothing.
Then score the business on six dimensions: customer demand, offer and price, sales and follow-up, delivery and quality, cash and money control, and people and time. Give each a score from one to five, where one means it is a real problem and five means it works well without you. Base each score on a fact rather than a feeling. If you say delivery is a four, write down the evidence, such as fewer than a certain number of complaints last month. Where you cannot find evidence, score it a two and treat the gap in evidence as the finding.
Finally, look for the constraint. It is usually the lowest score, but not always. A business with strong demand but weak collection is constrained by cash, not by marketing, and more advertising would only deepen the problem. Naming one constraint gives your next thirty days a direction and stops you from scattering effort across everything at once.
Apply it
3. How to apply it in your own business
Take a page and write your ninety-day outcome at the top in one sentence with a number and a date. Under it, list the six dimensions and give each a score with a one-line piece of evidence. Do this alone first, without discussing, for about thirty minutes. Then, if you have a partner or a senior person, ask them to score the same six dimensions separately and compare. Differences of two points or more are the most interesting, since they reveal blind spots.
Choose the lowest-scoring dimension, or the one that most directly blocks your outcome, and name it as your constraint. Write three possible causes for it and, for each cause, one cheap test you could run in a week. For example, if sales follow-up scores a two, possible causes are no list of enquiries, no time set aside, and no script; the tests might be to list this week's enquiries, block one hour daily, and write a five-line message.
Finally, decide what you will stop or delay to make room. A constraint is rarely fixed by adding effort on top of an overloaded week. Choose one activity of low value to pause for thirty days, tell your team, and record the date you will revisit the decision. Keep the diagnostic page in your plan file so you can rescore in ninety days and see whether the constraint actually moved.
Worked example
4. Worked example
Consider Lakshmi, who runs an online saree boutique from Hyderabad with two part-time staff. Her outcome is: within ninety days, cut the time she takes to reply to enquiries from about a day to under three hours, and reach 40 repeat buyers in the quarter. She writes it with those two measures.
Her scores out of five are: demand 4, offer and price 3, sales and follow-up 2, delivery 4, cash and money control 3, people and time 2. The total is 4 plus 3 plus 2 plus 4 plus 3 plus 2, which is 18 out of a possible 30, or 60 per cent. She stresses that the total matters less than the shape.
Two dimensions tie at 2. She asks which one blocks her outcome more. Slow replies belong to sales and follow-up, and they are caused by her own limited time. So she names sales and follow-up as the constraint, with people and time as the underlying cause. This is a useful insight: hiring more marketing would not help.
Her tests for the week are to list all open enquiries, block two evening hours for replies, and write four saved answers to the questions she gets most. She counts 35 open enquiries, and if she answers 7 a day she clears them in 5 days, since 35 divided by 7 is 5. She pauses her weekly newsletter for a month to create the time, and she notes the date to revisit.
At the end of the week she compares her plan with what happened. She answered 31 of the 35 enquiries and four remained, which she carries forward. She notes that two customers replied with orders, and she does not treat that as proof of a trend, only as a first encouraging signal. She also writes down that her average reply time is still uncertain, so next week she will record the time of each reply to get a real figure.
5. Common mistakes and how to fix them
The first mistake is setting an outcome with no number, such as "grow the business". Fix it by adding a measure and a date so you can tell in ninety days whether you succeeded. The second mistake is scoring by feeling. Fix it by writing one fact of evidence beside every score, and scoring a two when you have none.
The third mistake is picking three constraints because everything feels urgent. Fix it by choosing one, since the point of a constraint is that fixing it frees the whole. The fourth mistake is adding new work without pausing anything. Fix it by naming one activity to stop for thirty days, with a date to review that choice.
Key takeaways
6. Board summary
Diagnose before you prescribe: a short honest scoring beats a long vague worry. State a ninety-day outcome with a number and a date. Score six dimensions from one to five, each backed by one fact. Name one constraint and test three possible causes cheaply. Pause something to make room, and rescore in ninety days.
Check your understanding
7. Practice and self-check
- What is a business constraint? Answer: the one limit that currently holds back the whole business.
- Name the six diagnostic dimensions. Answer: demand, offer and price, sales and follow-up, delivery and quality, cash and money control, people and time.
- Lakshmi's scores are 4, 3, 2, 4, 3, 2. What is the total? Answer: 18 out of 30.
- What per cent is that? Answer: 60 per cent.
- Why might advertising not help her? Answer: her constraint is slow follow-up, not lack of demand.
- With 35 open enquiries and 7 answered a day, how many days? Answer: 5 days.
- Why write evidence beside each score? Answer: it turns feelings into facts and reveals where you lack data.
- What should you score when you have no evidence? Answer: a two, and treat the gap as the finding.
- Why pause an activity? Answer: a constraint is not fixed by piling work onto an overloaded week.
- When do you rescore? Answer: after ninety days, to see whether the constraint moved.