Wistron building MacBook Pro Touch Bars after original supplier falls short - report
Because of problems experienced by an initial supplier, Taiwan's Wistron is now handling at least some orders for the Touch Bar keyboard on the MacBook Pro, reports claimed on Tuesday.

Since the keyboard is difficult to build, its original supplier -- an unspecified company in Singapore -- was having trouble meeting Apple demand, according to the Chinese-language Economic Daily News, quoted by DigiTimes. It's not clear what percentage of orders Wistron might be taking.
In any case the first supplier's problems are allegedly partly to blame for delays in Pro shipments. When Apple announced its new models on Oct. 27, Touch Bar configurations were immediately saddled with a 2- to 3-week wait, which quickly stretched out to between 4 and 5 weeks.
The Touch Bar is a unique and complex piece of Apple hardware -- a multitouch display strip meant to replace function keys. The component has its own processor, the T1, and can present context-sensitive controls such as sliders and timelines. It even has Touch ID built in, supporting Apple Pay and fast logins.
Low yields of hinges and batteries may also be contributing to delays. Regardless, Apple has supposedly been "aggressive" about ramping up MacBook Pro orders, expecting high sales running into 2017.

Since the keyboard is difficult to build, its original supplier -- an unspecified company in Singapore -- was having trouble meeting Apple demand, according to the Chinese-language Economic Daily News, quoted by DigiTimes. It's not clear what percentage of orders Wistron might be taking.
In any case the first supplier's problems are allegedly partly to blame for delays in Pro shipments. When Apple announced its new models on Oct. 27, Touch Bar configurations were immediately saddled with a 2- to 3-week wait, which quickly stretched out to between 4 and 5 weeks.
The Touch Bar is a unique and complex piece of Apple hardware -- a multitouch display strip meant to replace function keys. The component has its own processor, the T1, and can present context-sensitive controls such as sliders and timelines. It even has Touch ID built in, supporting Apple Pay and fast logins.
Low yields of hinges and batteries may also be contributing to delays. Regardless, Apple has supposedly been "aggressive" about ramping up MacBook Pro orders, expecting high sales running into 2017.
Comments
All of these suppliers ramp up their production over time by improving processes, yield, etc. A lot of components are stockpiled during the production ramp before the product launch, and likely those stocks were depleted. In all cases, the bottlenecks alleviate after a few months.
It's a likely explanation why Apple staggers the worldwide release dates for many of its products.
You assume Apple has aggressive pricing demand, actually Apple tends to pay more depending on the item. Supply assurance and quality has a higher value to Apple. They are not in the race to the bottom, so forcing price over supply can backfire. I know supplier will cut other customer off at the knees if you are paying a little more than the low guys.
Again depending on the product, have more than one supplier is always a good thing. Considering this is a Apple design there could be challenges making it which were not see early one. It is not like there are a number of companies making this, but we know in a year or so there will be and all the PC guys will be trying to knock it off. They just need to convince MS to write software to make it work correctly.
http://www.iphonehacks.com/2016/07/apple-demanding-price-cuts-suppliers-due-slowdown-sales.html
http://www.zerohedge.com/news/2016-08-19/apple-demanding-cost-cuts-suppliers-after-30-plunge-orders-digitimes
In fact quite a few AI members chimed in on an article right here at Appleinsider
http://appleinsider.com/articles/16/08/19/apple-reportedly-squeezing-iphone-7-parts-suppliers-for-better-pricing
http://www.wsj.com/articles/apple-squeezes-parts-suppliers-to-protect-margins-1472713073
MBP's are made up of lots of parts, but the part that the vendor in question is having problems with is decidedly new technology. As a fact, Apple has only made four OLED components prior to the Touch Bar; two screens for the first generation watch, and two for the second generation. Maybe the vendor is having issues with the margins that they are making, but there is no indication at all that this is the case, so you, in essence, are pulling this out of your ass.
That brilliance ended up producing little (and very expensive) sapphire and a bankrupt company. It did feel a little Wal-Martish at the time.
Apple also can make or break these companies' quarters with their fairly unpredictable orders. We get all sorts of stories about unexpected profits and losses with iPhone screens and chips and modems.
So no, no evidence other than it happening before.