Consulting Guide: Working Capital Optimization

One cash-conversion cycle, not three initiatives

Working capital programs fail in a predictable way. Finance launches a receivables push, procurement launches a payables extension, and operations launches an inventory reduction, and each reports a win. Then the cash statement shows less improvement than the three initiatives claimed, because they were trading working capital between each other. Stretching a supplier by twenty days looks like a payables win until that supplier tightens your credit terms and shortens your customers' patience with the price increase you needed to hold the relationship. The three levers are not independent. They are three points on one cash-conversion cycle, and optimizing them in silos leaves cash on the table while the internal scoreboards say otherwise.

The discipline this guide teaches is to run receivables, payables, and inventory as a single program measured on one number: the cash conversion cycle, days sales outstanding plus days inventory outstanding minus days payable outstanding. A single owner holds the target. The individual levers are still worked by their functions, but the program only counts an improvement that survives at the cycle level after the second-order effects are netted out. That is what separates a real working capital program from three initiatives that each move their own metric and collectively move very little.

The prize is large enough to justify the coordination cost. A business carrying a 78-day cycle on $600 million of revenue has roughly $128 million tied up in the cycle. Pulling that to 57 days releases about $27 million of cash with no change to the underlying business, cash that funds growth without new debt or dilution. But the same interconnection that makes the prize large makes it fragile: a lever pulled too hard triggers a reaction that gives part of it back. The program's job is to find the point on each lever where the marginal day released still nets positive after the reaction.

Model the cycle, then release cash lever by lever

Build the cash-conversion-cycle model, set a target for each lever, and translate the day changes into released cash at the business's daily revenue and cost rates. The worked example is a $600 million-revenue distributor: daily revenue of $1.64 million, daily cost of goods of $1.15 million, and a starting cycle of 78 days. The table shows the target and the cash each lever releases.

Read the last two rows carefully, because they are the point of the program. The three levers gross to a 24-day, $31.6 million improvement. But extending payables seven days across a supplier base will trigger some price recovery and some tightened terms, and pushing DSO down eight days will lose a fraction of marginal customers, so the model books a three-day, $4.1 million give-back up front. The net target is 21 days and $27.5 million, and it is the number the program is held to. A siloed program would have claimed the $31.6 million, spent the next year explaining the shortfall, and never surfaced the give-back as a managed trade in the first place.

The model also sequences the levers, because they release cash at different speeds. Inventory reduction is the slowest, gated by supplier lead times and reorder points, so it starts first and books over three to four quarters. Receivables move faster, inside two quarters, once collections discipline and dispute resolution tighten. Payables are the fastest to change on paper but the riskiest to over-pull, so they move last and least. Presenting the cash-release curve by quarter, rather than as a single end-state number, is what lets the client plan how it will deploy the cash as it arrives.

Four phases, three decisions, four artifacts

• Phase one, weeks one to two: produce the scope and evidence pack. Build the cash-conversion-cycle baseline from the ledger, segment DSO by customer and DIO by SKU class, and make the framing decision in week one, naming the single cycle target and the give-back the program will tolerate.
• Phase two, weeks three to five: produce the recommendation memo. Set the per-lever targets, model the second-order effects, and make the evidence decision in week three, committing to the aging, supplier-terms, and inventory-turn data the targets rely on before analysis runs.
• Phase three, week six: produce the operating cadence document. Design the monthly cash-conversion-cycle review that reads all three levers together, and make the cadence decision in week six so the review is built alongside the plan rather than retrofitted.
• Phase four, weeks seven to eight: produce the handoff package. Give the operating team the cycle model, a per-lever playbook, and a scorecard that reports net cash released after give-back, not gross lever movement.
• Throughout: hold each phase to acceptance criteria. No lever target is accepted until its second-order effect is estimated and netted, because unnetted lever wins are the whole failure mode.

Where working capital programs leak

• Running the three levers as separate initiatives with separate owners. They trade cash between each other and each claims the win. Fix: one program, one owner, one cycle target.
• Booking gross lever movement as the result. The $31.6 million gross ignores the give-back. Fix: the scorecard reports net cash after second-order effects.
• Extending payables without pricing the supplier reaction. A DPO win that triggers price recovery can be cash-neutral. Fix: model the terms-and-price response before setting the DPO target.
• Chasing DSO by squeezing all customers equally. The marginal accounts you lose can cost more margin than the days are worth. Fix: segment DSO and target the slow-paying accounts, not the whole book.
• Declaring victory at engagement close. Released cash creeps back the moment the cadence stops. Fix: the monthly cycle review keeps all three levers on target after handoff.

Before you present the program

• The cash-conversion-cycle baseline is built from the ledger, with DSO segmented by customer and DIO by SKU class.
• Each lever has a day target and a cash-release figure at the business's actual daily revenue and cost rates.
• The second-order give-back is estimated and netted, so the program target is net cash, not gross lever movement.
• The DPO target is tested against likely supplier price and terms responses before it is committed.
• The operating cadence is a monthly review that reads receivables, payables, and inventory together under one owner.