put together

to put the parts of something in the correct places and join them to each other:
It took several hours to put the puzzle together.

to prepare a piece of work by collecting several ideas and suggestions and organizing them:
The management are putting together a plan/proposal/package to rescue the company.
It takes about three weeks to put the magazine together.

said after a phrase that refers to a group of people or things to show that you are thinking of them as a group rather than separately:
She earns more than all the rest of us put together.
The population of the US is bigger than that of Britain, France, and Germany put together.
(Cambridge Advanced Learner's Dictionary & Thesaurus からの put sth together の定義 © Cambridge University Press)

ビジネス英語
to prepare a piece of work by organizing several ideas and suggestions:
put together a plan/proposal/package The management are putting together a proposal to rescue the company.
It takes about three weeks to put the magazine together.
(Cambridge ビジネス英語辞典 からの put sth together の定義 © Cambridge University Press)

- Cambridge Dictionary