Proposal waste, the hidden cost of unqualified buyers in machine manufacturing
Every proposal your engineering team writes for an unqualified buyer is paid for. In hours, in attention, in opportunity cost. Here's how to measure it, and how to stop it.
In 2017, the engineering manager at the machine manufacturer where I ran revenue came into a meeting holding a stack of paper. He said: “I want to know how many of these closed.”
The stack was every proposal we’d written that year. We worked it out together. About 30% closed. The rest were paid for by us, in engineering hours, in proposal time, in attention that didn’t go to real customers.
That was the day proposal waste stopped being abstract and became a number.
What does proposal waste actually cost you?
Here’s the formula:
(Proposals sent × hours per proposal × loaded engineering cost per hour) × (1 − close rate)
Most machine manufacturers I work with land somewhere in this range:
- 30–80 proposals per year
- 8–25 engineering hours per proposal (technical specs, customisation, BOMs)
- $80–$150 loaded cost per engineering hour
- 25–35% close rate
Run the math. The answer is almost always between $300K and $1.2M per year in pure engineering cost on proposals that never close. That’s before we count opportunity cost, the real customers who got slower responses because engineering was buried.
Almost nobody in machine manufacturing actually calculates this. They sense it (“we’re stretched”), they complain about it (“the same customers keep tire-kicking”), but they don’t put a number on it.
Why does this keep happening?
Three causes, in order of how often I see them:
Do your salespeople send proposals just to keep a deal alive?
If qualification is fuzzy, the only way to look serious to a prospect is to write a proposal. So they ask engineering. Engineering writes. The proposal sits in a drawer.
Can engineering tell a real request from a tyre-kicker?
Without a buyer-behavior signal upstream, engineering has no way to triage a “kick the tires” request from a real opportunity. They default to giving everyone a real answer.
Is the CEO the only person allowed to say no?
If qualification authority lives only with the CEO, every proposal request reaches engineering by default, because nobody else has the authority to redirect.
What does the fix actually look like?
Step 1, Measure your real waste. Take last 12 months of proposals. Calculate the cost. Write the number on a whiteboard.
Step 2, Define qualification as one binary question. It can be almost anything reasonable. “Has the buyer confirmed a budget range in writing?” “Has the buyer described the actual application in detail?” Pick one. Make it binary. Make it written.
Step 3, Make engineering’s job depend on it. No qualification answer in writing? No proposal. The salesperson goes back to the buyer first.
This is unpopular in week one. It is also the single highest-leverage change a manufacturer can make.
What number should you expect after 90 days?
For companies that install this discipline correctly, we typically see:
- 30–40% fewer proposals written
- Same or higher total close rate (because you stopped wasting time on tire-kickers)
- Same or higher revenue
- Engineering capacity freed up for the deals that actually matter
The deals that close don’t close because you wrote a longer proposal. They close because the buyer was ready. Stop subsidising the buyers who aren’t.
Won’t qualifying harder cost you deals?
This is the first objection every time, and it deserves a straight answer rather than reassurance.
It costs you proposals. It does not cost you deals. Those are different things, and conflating them is what got the stack of paper onto the engineering manager’s desk in the first place.
What happens is that your win rate goes up, because you win more of fewer proposals. Total revenue holds or grows. What changes most visibly is not the revenue line, it is engineering capacity and morale, because the team stops spending a third of its year on work that goes in a drawer.
If a buyer walks away because you asked one qualifying question in writing, you learned something cheap that you would otherwise have learned after twenty engineering hours.
Who should not do this?
You close most of what you quote. If your close rate is already north of 60%, your proposals are not the problem and this will cost you more than it returns.
Your proposals are cheap to produce. If a quote is a price list and a lead time rather than twenty hours of engineering, the arithmetic above does not apply to you.
You are in a land-grab. Entering a new market where every proposal is also market research is a legitimate reason to write proposals you expect to lose. Just do it deliberately, with a number attached, rather than by accident.
What is this not?
This isn’t “qualify harder so you can charge more.” It’s “stop paying for proposals that don’t pay you back.” Same total business. Less waste. More margin.
The proposal isn’t the sales tool you think it is. The conversation that happens before the proposal is.
The numbers above are from my own work with manufacturers in this size range, not from a study. The wider approach, answering the questions buyers actually ask before they ask a salesperson, is the They Ask, You Answer framework, listed by Forbes in 11 Marketing Books Every CMO Should Read and which I co-authored in French. The results it produced at Impack Packaging are documented by the coaching partner who worked with us.