What's your role in the project? Are you a Project Manager, or are you discussing this with others who are equal in role definitions?

@Snow I'm the assistant project manager. The team member that said that to me isn't equal in role, but they are the one who designed the device. I'm simply asking on the number (performance related) that they could commit to us, but they said I ask too much detail

Did you mean team performance or application performance?

application @svgrafov

Was it clear to the team it is application related tracking? There is no reason to believe that the team doesnt feel trusted because you track downloads/visits/clicks or whatever, as it has little to do with the team. These are numbers concerning marketing, SEO and maybe the design team.

@bibleblade yes it is clear. At that moment we're obviously quantifying the technical performance of their solution

It looks like you're just trying invent criteria for the sake of having criteria?

@JoeStrazzere its not even that detailed in my opinion. Its just the topline criteria. But from their perspective, I'm trying to control so much. This criteria is needed because it is the one that justifies the investment to this work.

@el-cheapo - if that's the case, then the answer to "What should I do in this situation?" is "Explain why this level of detail is important for justifying the work."

@el-cheapo "This criteria is needed because it is the one that justifies the investment to this work". does not agree with "I've been thinking what should we track on the performance related variables."

Can you give an example of such criteria? The response of your team does not match what you tell us here. No dev would say "you don't trust us" to you requiring the service to have a response time of under 500ms. Something is weird here and you have been very ambiguous and sparse on details.

@nvoigt what makes them think I dont trust them is that they have given me the proof of their solution working for other company. But of course want to test in in our environment as well, so I ask them to do it again with our own criteria. This request of doing it again is what makes them think I dont trust them

I think I need to edit the details first to clarify all this, brb on that

Reading between the lines, I think OP works for Company A. They are installing a product produced by Company B. The person challenging the specific details seems to be an employee/representative of Company B, working with Co. A to get the product installed. By challenging the need to gather detailed metrics, it strikes me that this other employee may be attempting to hide something.

>>But of course want to test in in our environment as well. Why? Is your machine customised in some way from other machines previously deployed? Does it take different inputs or produce different outputs? If so, there's your response: "the machine performs at that speed for the Acme config, but we are using Foo v2, instead of Bar widgets and I want to test that aspect. OTOH, if you just plug it in and it whirs away at XXrpm, why do the extra tests? But at the end of the day, trust doesn't matter. If they want you to buy their machine/solution, they play by your rules or you go elsewhere.

@mcalex I disagree - at the end of the day trust is the only thing that matters, whether the project is a success or not. Do you think the OP will get any more "trust" on the next project they are leading, after this one? Even if the targets are deleted, most likely people won't believe they have been deleted but that the OP has just stopped overtly talking about them.

Everything I'm reading implies that "machine" refers to some computer device, but I can't find any mention of that from yourself @el-cheapo. Also, you don't have a big Stack Overflow presence, but you have a bigger Engineering presence. Are you talking about a machine that does something physical on a production line? Reading the question/comments/answers seems to me that there's a big misunderstanding and people assume you're a programmer buying a server

@JoshPilkington yes, its a production related machine, not a computer. Huge misunderstanding but it also comes from my mistake of less detailed question at the beginning.