Sure! I'm assuming you're talking about coffee. I aim to get the best coffee possible as cheap as possible, so these factors are by far not optimized but they're good enough for me:

• Coffee beans: Getting coffee that you like is maybe the most important factor. The first time I tried floral coffee, I thought my cup was not properly washed and still had detergent in it. Now I know I don't like floral coffee!
• Water: I hate myself for doing this because of the plastic waste I generate, but buying a massive container of water that has been purified by reverse osmosis consistently results in way better coffee than using my tap water.
• James Hoffman's V60 recipe v.s. Osmotic flow: James Hoffman's V60 recipe is a thousand times better. I think the main factor here is agitation; in this case, more is better. I have not experimented much beyond Hoffman's recipe because I like it. It's possible I could optimize a bit more with little cost.
• The cheapest grinder my partner used in their previous place v.s. the grinder we recently bought: I am so sorry if I sound like a snob, but getting a grinder that is capable of creating uniform grinds has been game changing. It's not even close.

The way that I think about these factors is that I'm affecting the extraction of the coffee. I'm trying to take the things that taste good in coffee and leave the things that don't taste so good. I'm playing a balancing game: not too extracted and bitter, not too underextracted and insipid.

Of course, there are other variables that I could try to optimize for, such as body, acidity, sweetness, etc.. Maybe I will someday pay attention to it, and if it's not expensive or hard to optimize for them, then I'll be happy to change my way of making coffee. In the meantime, I'm happy with what I've got.

In the off chance you meant Scrum and ACT-Advisor stuff:

• In Scrum, I'd say a lot of the experiments end up affecting factors that have, in the literature, already been identified as important: happy workers are more productive, stable interfaces between teams leads to faster development and higher quality work, cross-functional teams are better than having handoffs, etc..
• As to the ACT-Advisor stuff, this may seem obvious, but doing Acceptance and Commitment Therapy improves my scores. I like to see that it's not only therapy sessions that improve the scores, but also weeks of intensively doing ACT exercises on my own.