Step 1. Identify the use cases and logical data model

Objectives

• Gather the business needs and use cases that require a NoSQL database.

• Define the logical data model by using an entity-relationship (ER) diagram.

Process

• Business analysts interview business users to identify the use cases and the expected outcomes.

• Database engineer creates the conceptual data model.

• Database engineer creates the logical data model.

• Database engineer gathers information about item size, data volume, and expected read and write throughput.

Tools and resources

• Business requirements assessment (see template)

• Access patterns matrix (see template)

• Your preferred tool for creating diagrams

RACI

Business user	Business analyst	Solutions architect	Database Engineer	Application Developer	DevOps Engineer
C	R/A	I	R

Outputs

• Documented use cases and business requirements

• Logical data model (ER diagram)