In February 2024, my director sent me a message that sounded like an errand: Get quotes for the screen replacement. It wasn't an errand. A year later, I still use that screen replacement as the example I give when people ask why I never compare supplier quotes by the first number on the page.
I manage procurement for a 150-person mineral processing company. For six years, I have tracked our parts and maintenance budget, roughly $1.7 million a year, plus every capital project tied to that budget. I have watched the cheapest option become the most expensive option more than once. This is the story of one of those times.
The Trio Tender
The request was straightforward. We needed a new vibrating screen in the dry plant. The specification was written. The question was who would build it. Because our procurement policy requires at least three suppliers, we sent the same spec to three qualified vendors. My colleague named it the trio tender.
Before the quotes arrived, our finance manager said, half joking, This is trio funding. I thought he meant three vendors. He explained: operations control the uptime budget, maintenance controls the repair budget, and finance controls the capital budget. Three separate funding streams had to agree on one purchase. The phrase stuck. Trio funding became the code name for the whole evaluation. Looking back, that name saved us.
The quotes came back with a 22 percent spread. The first supplier quoted $218,900 delivered and commissioned. The second supplier quoted $196,400 plus freight and startup support. The third supplier quoted $169,800 ex works and no site visit. All three said the machine would meet our tonnage and screen area requirements. That is where the easy comparison stopped.
If I had looked only at the top lines, I would have chosen supplier three. From a distance, $169,800 was clearly better than $218,900. Up close, it was different.
The Surprise Wasn't the Price Gap
I put the three quotes into the same line-item spreadsheet I use for annual maintenance contracts. The first red flag was freight. We are about 700 kilometers from the nearest port, and the screen was an oversized load. The transport quote came back at $12,800. That wasn't included in supplier three's bid. Start-up support wasn't included either. Neither was commissioning, training, or a spare parts package for the first year. Supplier three's warranty started when the machine left their warehouse, not when it started running. Supplier one's warranty started at start-up and included 24 months of parts and labor.
The surprise wasn't that the quotes were different. The surprise was that the cheap quote was only cheaper right up to the moment the truck arrived. Once I added freight, commissioning, training, first-year consumables, and the cost of an eight-week longer lead time, the third quote had almost no advantage left.
Nobody wanted to hear that. The operations manager wanted the cheapest machine that met the spec. The finance manager wanted to avoid a budget overrun. The maintenance manager wanted to know who would answer the phone when the screen stopped.
The Second Congress
Our internal buying group meets every quarter. The February meeting was just a schedule update. The second congress of the buying committee was in April, and that is the meeting I remember.
At that meeting, the maintenance engineer wrote WSG on the whiteboard. He meant warranty support group. Every vendor talked about service, but none had defined it. We asked each supplier to name the group, response time, and parts dispatch process. Supplier one gave a named engineer and a 24-hour emergency line. Supplier two gave a regional service engineer who would call back within one business day. Supplier three said, Our head office handles support. That sentence cost them more than any price line.
Something else happened before that meeting. A courier dropped off a small velvet pouch at reception. Inside was what the label described as a pair of Dinny Hall bijou star trio stud earrings. There was no invoice, no purchase order number, and no reason for us to receive it. We logged it in our gifts register and returned it. I do not think the earrings were meant as a bribe. But in a competitive tender, a gift is a cost, even if no one wrote it down. If the quote had to include a velvet pouch, I wanted to know what cost was removed to pay for it.
The maintenance manager later made a strange comparison. He said, Half the time people ask how does Simparica work, they're really asking whether one dose will protect the pet forever. It doesn't work that way. You follow the schedule. Same with a machine. He was talking about preventive maintenance, but it applied to our decision. The total cost of a machine is not set on the day it is installed. It is set by the schedule you follow.
In the end, we selected supplier one. The purchase order was $218,900, about $49,100 higher than the low quote. According to our five-year TCO model, the first option was $27,300 cheaper once freight, commissioning, startup support, spare parts, warranty coverage, and probable downtime were included. I cannot prove that $27,300 because we only bought one machine. But that is the job of a TCO model: to make assumptions visible.
The machine went online in July, ran through the rest of the year, and the commissioning engineer stayed an extra day to train our mechanics. I still do not know if the first supplier's service is genuinely better than the third supplier's service. What I know is that their contract defined how we would find out.
Cost Lesson
The phrase trio funding stays in our vocabulary. Now I require every major quote to include a schedule of excluded items, a named WSG, and a cost line that starts before delivery and ends after commissioning. Price is what appears on the purchase order. Total cost is what appears in the operating budget later.
I don't mind buying something that looks expensive. I mind buying something twice.