Name the design phase of SDLC

Generally, design is performed in the below two steps:

i)  Primary Design Phase: In this phase, system is designed at block level. Blocks are created on the basis of analysis done in problem identification phase. Various blocks are created for different functions emphasis is put on minimising information flow between blocks. Hence, all activities that require more interaction are kept in one block.

ii)  Secondary Design Phase:  In secondary design phase detailed design of every block is performed.

The input to design phase is Software Requirements Specification (SRS) document and output is the Software Design Document (SDD).