We are starting a project and even with FTE's within the company, "consultant" has convinced management to hire IBM resources because of cost. The high sounding reason within the presentation twisted it to - FTE's are not expert in this tech so they won't be able to do an efficient job.
But it is always that the end resources from IBM are even more incompetent. They end up delivering a product which is terrible. Even the final handovers and KTs are done terribly.
In the end, management has no option but to continue hiring IBM (or any service business) to support the shoddily done project.
This doesn't mean all implementations from a services business is terrible. It all comes down to cost and ability to spend. If you pay peanuts, you get monkeys - this is aptly true.
To answer your last question - Yes there are different entities within IBM. There is GBS which takes up most of the consulting and up-selling IBM products and services. Development for example Watson is done by IBM Labs. A list can be found here: http://www-07.ibm.com/in/careers/businessunits.html
At an old employer who I'm no longer with, I asked why there's a part of the application in Java (the rest has always been in .net). They told me that an army of IBM consultants made that decision and now there's a part of the code in Java and it sticks out like a sore thumb.
But doesn't the word get around ? does nobody in most enterprizes think long-term when investing ?
IBM is optimized in enterprise (including government) sales. Product is not quite irrelevant, but it's a specialized enough market that often mediocre substantive quality does quite well, because the only competition that matters are the others that are optimized for that market.
Wasn't there a saying that no one got fired for buying IBM.
I've seen it many times.
Misinterpretation is a recursive problem. The best description - by far - of this process is "How a plan becomes policy" (aka, "How Shit Happens").
As the staff back away slowly from the creep, that just makes more space for IBM, and they sell progressively more service hours. It's pretty much their MO.
Broadly, yes, IBM is run as various different divisions, and the divisions start very high up the organisation, only a couple of levels from the top. They rarely interact in my experience (as a software guy there for some years in the past)