For ETFs I pretty much exclusively use Genuine Impact for the screening process.
Their rankings for funds look at the performance, minus fees, and how much risk you take. The ideal situation is great performance, fees that aren’t trying to take your shirt (unless the performance is super special), and they are not taking wild risks with no real upside.
For my portfolio I have my stock picks 20-40% of my assets depending on whats happening in the world, and the rest is spread across ETFs/Funds/Investment Trusts that represent my beliefs.
e.g. I believe the UK FTSE100 will carry on delivering decent returns no matter what happens with Brexit due to them having most of their revenue generated outside the UK (yes tariffs could be a pain but I am assuming we aren’t that stupid.) So I look through Genuine Impact for UK geographically focused Equity funds. From there that gives me the short list of what mandates to look into.
This is actually how I found a cloud computing ETF where they only invest in cloud related companies (from the parts to the services) which is performing very well and the risk is well managed.
As I said this is my flow. I think about my world view (in terms of allocation of my portfolio) and then I look for securities that fulfil my needs. I use the app to short list which ones to focus on and then decide what flavour I like more.
It’s kind of like deciding what you want for dinner, that is your overall view of the world. Then you go OK what goes into that meal, so I’ve picked burrito now I need to think about how much rice and what type of rice I want. This is where I use Genuine Impact to screen the types of rice available to me. Then I say yeah they think Black Beans is the best fit but actually I personally like the sound of Pino Beans right now (if this sounds like a terrible burrito that’s because I’m starting to reject my choice of metaphor.)
Short answer is, what do you need the ETF for (what purpose are you trying to fill in your portfolio, do you want generic US exposure etc.), second screen all the funds available that meet that need with Genuine Impact (same way you would use Simply Wall St for screening UK value stocks basically), then with the short list investigate each fund/ETF to see which one fits your need. e.g. how passive do you want it, how much risk do you like.
As mentioned before I use a mix of ETFs/Mutuals/Investment Trusts. ETFs have a lot of good liquidity, mutuals can cost less than ETFs if you want something passive, investment trusts can be extremely expensive but they super active and drive a lot of beta (ideally!) That’s how I like to mix my burritos anyway!