The conceptual design steps that identifies main processes: insert, update, and delete rules is .

Data-model verification.

Explanation:

Conceptual design is the first and important step in design which takes note of the interaction, experience and customer or user needs to create plans of the function and form of events in an application. It sketches out the importance ideas to be implemented.

There various steps in conceptual design from identifying user needs to a developed design. The data model verification is a step that define the method of inputting data and maintaining application structures, which are called the main processes.