Respuesta :
Each of the following activities are commonly performed during the implementation of the Database Life Cycle (DBLC). DBLC Task Numbers: 1. Database initial study 2. Database design 3. Implementation and loading 4. Testing and evaluation 5. Operation 6. Maintenance and evolution
Explanation:
- Database initial study : The basic data dictionary components are developed as the entities and attributes are defined during this phase.
- Database design : The data dictionary contents are used to verify the database design components: entities, attributes, and their relationships. The designer also uses the data dictionary to check the database design for homonyms and synonyms and verifies that the entities and attributes will support all required query and report requirements.
- Implementation and loading : The DBMS's data dictionary helps to resolve any remaining attribute definition inconsistencies.
- Testing and evaluating : If problems develop during this phase, the data dictionary contents may be used to help restructure the basic design components to make sure that they support all required operations
- Operation : If the database design still yields operational glitches, the data dictionary may be used as a quality control device to ensure that operational modifications to the database do not conflict with existing components.
- Maintenance and evolution : As users face inevitable changes in information needs, the database may be modified to support those needs. Perhaps entities, attributes, and relationships must be added, or relationships must be changed. If new database components are fit into the design, their introduction may produce conflict with existing components.
