грамотно выстроенные отношения

[Ромбос]

Коллеги, помогите, пожалуйста:
Успешное выполнение большинтсва проектов зависит от грамотно выстроенных отношений с поставщиками

A succesful performance of the most projects depends on correctly (or competently) build relations with the suppliers?

[%&$]

Options:
To be successful/ a success a majority/most of projects require balanced and coordinated relationship with suppliers/vendors.
Balanced and coordinated relationship with suppliers/vendors are to key to...
A success in a majority/most of projects is hinged on/pivotal on/is riding on/rests on
For your success in a majority/most of projects you depend on...

[Ромбос]

Спасибо!

[lady VINTer]

"are to key to"
...are the key to...

ещё вариантик:
most successful projects are the result of ...

"balanced and coordinated relationship with suppliers"
хороший перевод.