Turnkey
Definition 1 of 2

Instant Utility
Describes a product or service that requires no additional work, effort or setup from the buyer.

They purchased a turnkey software system for their business.
Business Context
Commonly used in business to emphasize how a product or service can save time and money.

He acquired a turnkey franchise, enabling him to start trading right away.
Metaphorical Use
Often used metaphorically to suggest simplicity and ease of operation.

The turnkey solution made event planning a breeze.
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