я понимаю, это какие-то подходы к организации деятельности компаний.

Bid/Build – Getting on the Consultant A List

bid on virtually everything that a certain firm releases, as well as certain jobs that don’t make it into the public bid

domain.
The issue of bid/build vs. design/build is a passionate topic that’s been discussed, analyzed, and disputed by

greater minds than mine in many business forums, but ultimately there is no right or wrong, it’s just a matter of what

works best for your company at a particular juncture in your corporate history. However if you’re considering getting

into the bid/build arena, or if you’re already there and want to expand further, here’s some information that might be

useful.
Let’s start with some basics:
Some reasons not to get involved in bid/build jobs:
1. You are so busy with design/build work that you can’t conscientiously accept another job.
2. You have an established engineering protocol that does not adapt well to bid/build.
...

d/b это когда один и тот же подрядчик и проектирует и строит.

b/b это когда проектировщиком выступает один подрядчик, а контракт на саму постройку выставляется на конкурс, по результатам которого уже определяется Застройщик.