As a customer, Mike S. would be what I consider a good supplier.
I cannot stand when my suppliers don't respond to my SCARs. It took me work to GET the information in the system and I don't do it because I am bored. I do it because the issue is slowing down my processes and costing me money. If I was bored, I goof around on the internet or something. Trust me. We don't "come up with issues to justify our jobs" like it sometimes feels. There are PLENTY of issues in a regular day. Admittedly - it does get a little inconsistent as to WHAT we raise as an issue, and the reason is the volume of competing issues. If I have 3 major spills going on, your minor ding (that may be a problem) isn't going to get attention. But, if I don't, it is. Which is why to the supply base it sometimes feels that we are picking on you. We aren't, you're just not the worst supplier that day.
Stop whining about having to fill out 8Ds or whatever. Just stop it. A supplier who fights the 8Ds, I usually pull out several of their emails and say "Look, the information that goes into the
8D is all in this pile of emails you sent me (making more work for me). Why didn't you just consolidate this all together and fill out the 8D? You are choosing the path of MORE work fighting it." And it is ALWAYS true.
(Insider tip - if you send me a ****, disorganized 8D, I am going to dig. And don't forget, it's our job to dig, and we have gotten good at it. We can make you miserable. So show a little professionalism and don't pencil whip it.)
(Second insider tip - Yes, I know, I have customers too. SOME 8Ds are ridiculous. They are, in truth, 8 pretty simple steps. 3 of them *I* have to fill out, not you, so your work is really only 5 and the last step is "Congratulate the team." But some people start down this road of "It would be great if we had ... a FISHBONE in the 8D. THEN they want a 3x5 why. Then a PPS outline. Then this, then that. These are all great tools, but you don't have to use every one, every time. So if your customer is giving you one of these goliath 8Ds, my suggestion is ... make your own. A neat, SIMPLE 8D. 2 pages max. THEN if you NEED to use one of the "tools" (and you should use one, they DO work, pick the appropriate one), ATTACH it to the end. Look at your customer and say "We would prefer to USE OUR 8D because that STANDARDIZES our shop. And if we standardize, you get better product." MOST customers will agree because it makes sense. But again, it can't be half ass. Make a professional template. Use it every time. And soon, it won't be nearly the work you think it is. You want your customer off your back? Be quick, concise and professional. There are plenty of other suppliers out there who AREN'T that will distract them.)
(Third insider tip: Do NOT put "operator error" as the root cause. For some reason, that's like a trigger phrase with supplier quality. 95% of the people I know in the trade, and I know a LOT of them, go on a hunt with an almost palpable fervor if you send an 8D that is "operator error.")
Now - your ORIGINAL question was ... how do you get the supplier to respond. There are a few ways.
1) Get off your butt and go see them. Show up at their place and demand their attention. Tell them "I am here because I am not confident in the data you are sending me, so we are going to look at it here."
2) Get your purchasing department off their butts and have them notify the supplier they are now OFF the bid list.
3) Get your accounts payable department off their butts and have them debit the payment of the next shipment the cost of having to deal with their quality problem.
4) Call their TS-16949 registrar and have them de-certify them, which they can absolutely do. This (should) take them off of EVERYONE's bid list.
All 4 work. Some better than others. But always remember you also have to have a RELATIONSHIP with your supplier. This doesn't mean you have to always accept bad parts. It DOES mean you have to listen to their side and sometimes be understanding of their problems, some of which YOU definitely create.
And don't forget, when the dust settles and all the faffing around is all done, fingers pointed, root cause documentation published. All the ****. It boils down to two, and only two, questions:
Supplier: Do you want these parts?
Customer: Do you want my business?