It is also known as high level design that focuses on the design of system architecture. Updating costs, benefits, conversion dates, and system constraints. Specifying the input/output media, designing the database, and specifying backup procedures.ĭevising a test and implementation plan, and specifying any new hardware and software. It is concerned with user interface design, process design, and data design.

It produces the working system by defining the design specification that specifies exactly what the candidate system does. It focuses on how data is entered into a system, verified, processed, and displayed as output. Physical design relates to the actual input and output processes of the system. Data flow diagram, E-R diagram modeling are used. While preparing the logical design of a system, the system analyst specifies the user needs at level of detail that virtually determines the information flow into and out of the system and the required data sources. It describes the inputs (sources), outputs (destinations), databases (data stores), procedures (data flows) all in a format that meets the user requirements. Logical design pertains to an abstract representation of the data flow, inputs, and outputs of the system. Metadata to define the tables/files and columns/data-items.Ī function hierarchy diagram or web page map that graphically describes the program structure.Īctual or pseudocode for each module in the program. Infrastructure and organizational changes for the proposed system.Ī data schema, often a relational schema. System design gives the following outputs − Proposed system requirements including a conceptual data model, modified DFDs, and Metadata (data about data). System design takes the following inputs − In this phase, the complex activity of system development is divided into several smaller sub-activities, which coordinate with each other to achieve the main objective of system development. It is the phase where the SRS document is converted into a format that can be implemented and decides how the system will operate. This phase focuses on the solution domain, i.e. System design is the phase that bridges the gap between problem domain and the existing system in a manageable way.

Sub system designer