Start with the decision the number must support
Business measures are easy to confuse because several can be expressed as a percentage. Margin asks what survives direct cost on a sale. Markup starts with unit cost to set a price. Break-even turns fixed cost and contribution into the volume required to cover a period. These are pricing and volume questions, not interchangeable views of the same result.
Keep cash, profit, and demand on separate lines
ROI compares money committed with money returned over a completed holding period. Burn rate describes observed movement in the bank balance; runway extends a current cash gap into a planning horizon. A profitable invoice can improve neither cash nor runway until it is collected, while a financing receipt can improve cash without improving operating performance. Record the date and source behind each figure before combining them in a management discussion.
Read marketing measures by cohort
ROAS associates revenue with advertising spend. CAC divides the cost of winning customers by a defined new-customer count. Lifetime value estimates gross profit from future repeat behaviour. A campaign may have strong platform-attributed revenue yet poor contribution margin, or inexpensive leads that never become paying customers. State the attribution window, activation definition, refund treatment, and gross-margin basis so that the three measures can be compared honestly.
Inventory needs its own operating lens
Inventory turnover relates annual cost of goods sold to stock held at cost. Its days-on-hand companion helps connect working capital with lead time, replenishment, and stockout risk. A warehouse ratio should be split by product family when spare parts, seasonal goods, and fast-selling staples share the same building. One company-wide average cannot decide which SKU to buy next.
Use a scenario record, not a headline
For every result, keep the period, currency, source system, and treatment of exceptions such as returns, tax, financing, and restricted cash. Change the assumption that can actually move the decision, then retain both cases. The useful output is not a dashboard decoration; it is a calculation that another operator can reproduce and challenge with the same records.
Price, contribution, and volume form one operating chain
Consider a product sold for $75 with $31 of direct cost. Its $44 contribution is not a margin percentage and is not a cash receipt: it is the amount available from each sale to cover a chosen period's fixed cost. At $48,000 fixed cost, that chain requires 1,091 whole units. A price cut, supplier increase, or higher return rate changes the contribution before it changes the sales target. This is why a price list should retain the cost source and a break-even plan should retain the volume assumption; a revenue total cannot show which link broke.
Marketing indicators need compatible clocks
Advertising spend can be paid when an impression is bought, a lead can arrive later, a customer can activate later still, and gross margin can appear after a return window closes. ROAS, acquisition cost, and lifetime value are useful only when their dates and definitions are declared. A $12,000 campaign that is credited with $54,000 of revenue has 4.50x ROAS, but that statement does not say how many buyers were new, how much margin they produced, or whether the revenue was refunded. A cohort sheet keeps those questions separate instead of letting one attractive ratio stand in for all three.
Cash measures begin with what is actually spendable
A bank balance may include customer advances, tax amounts awaiting remittance, or funds restricted for a particular purpose. Treating all of it as operating cash overstates runway. Likewise, a lower net burn can reflect a financing receipt or a delayed supplier invoice rather than a cheaper operating model. A monthly bridge from opening cash to closing cash makes that distinction visible; a forward schedule adds the dates of payroll, collections, lease changes, and known purchases. The burn result summarizes an observed interval, whereas the runway result assumes a future gap persists.
Inventory ratios need item-level evidence
Eight annual turns and 45.6 days on hand describe an average stock investment, not a reorder instruction. The figures only make sense when cost of goods sold and inventory are measured on the same cost basis. A fast seller can stock out while a slow item makes the aggregate inventory appear ample. Segment the report by product family, then compare days of supply with each supplier's lead time, minimum order quantity, and demand variation. The ratio directs attention to working capital; it does not decide the service level a business owes its customers.
Keep the calculation beside the record that controls it
Supplier invoices support a unit-cost assumption. Sales and returns ledgers support a margin period. Campaign exports and customer activation records support marketing cohorts. Bank statements and a due-date schedule support cash analysis. Stock counts and valuation policy support turnover. These sources may disagree in timing or scope, and the disagreement is often the operational issue worth finding. Browser arithmetic can make a scenario reproducible, but it cannot choose accounting policy, validate an attribution claim, or replace the contract and record that govern a real transaction.
Build a decision sheet before comparing alternatives
Put alternatives on the same period and basis. A $69.30 product price calculated from a $42 cost cannot be compared with a $75 price that includes delivery unless the cost scope is made consistent. A 4.50x advertising result cannot be weighed against a $180 acquisition cost until customer definition and attribution period are stated. A 10.6-month runway should identify the cash available and the revenue scenario, while an eight-turn inventory ratio should identify the valuation and dates. The purpose of the sheet is not to make unlike measures look alike; it is to expose exactly where they differ before a commitment is made.
Use thresholds as prompts, not automatic verdicts
A target margin, return, or turnover level may be useful for monitoring, but no universal number decides a business question. A thin-margin item may be strategic because it brings repeat demand; a long runway may still be unsafe when obligations are concentrated; slow stock can be appropriate when replacement lead time is severe. Set the threshold from the business model, then record the exception and the evidence for it. This keeps a calculation honest: it supplies a repeatable relationship and scenario, while the accountable operator remains responsible for the judgment that follows.