In which mode of market entry does a contractor agree to handle every detail of the operation for a foreign client, and hand over the operation once it is fully functional?

The answer is "turnkey project".

A turnkey project is an undertaking contract under which a firm consents to completely configuration, develop and prepare an assembling/business/benefit office and turn the task over to the venture proprietor/Client when it is prepared for activity.  

A turnkey project is generally created by a group of contractual workers and undertaking pioneers who have involvement with the sort of task that is being delivered. These temporary workers will do everything required for the venture. An undertaking thought is frequently given over to them and they are required to create the venture up to the guidelines set by the Project proprietor/Client.

The answer is turnkey project!  

Further Explanation:

Turnkey Project:

The term turn-key undertaking (Turn-key conveyance) depicts a venture ( or the conveyance of such) wherein the provider or supplier is dependable to the customer for the whole aftereffect of the task and exhibits it to the customer totally completed and prepared to utilize.  

turnkey venture model:  

Undertaking proprietors may include contractual worker to execute ventures. ... The Design, Build and Operate (DBO) and Build, Own, Operate and Transfer (BOOT) don't order as Turnkey ventures. Models are: Buying another vehicle.  

Turnkey mean in development:  

A sort of development contract under which the development firm is committed to finish an undertaking as per prespecified criteria at a cost that is fixed at the time the agreement is agreed upon.  

turnkey business:  

A turnkey business is a business that is prepared to utilize, existing in a condition that considers prompt activity. The expression "turnkey" depends on the idea of just expecting to turn the way to open the ways to start tasks.

turnkey process:  

turnkey arrangement. A kind of arrangement that is effectively or promptly conveyed into a present business, framework or procedure by an outsider, which can be utilized quickly once introduced or actualized. For instance, a site, preparing project or charging framework.

Subject: Business

Level: High School

Keywords:  Turnkey Project, turnkey venture model, Turnkey mean in development:, turnkey business, turnkey process.  

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