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A software design description (a.k.a. software design document or SDD; just design document; also Software Design Specification) is a representation of a software design that is to be used for recording design information, addressing various design concerns, and communicating that information to the design’s stakeholders.
A high-level design document or HLDD adds the necessary details to the current project description to represent a suitable model for building. This document includes a high-level architecture diagram depicting the structure of the system, such as the hardware, database architecture, application architecture (layers), application flow ...
Hence, BRD documents are complemented with a systems reference document (SRD) OR Technical Design Document (TDD) that details the design, technology performance and infrastructure expectations, including any technology requirements (non-functional) pertaining to quality of service, such as performance, maintainability, adaptability, reliability ...
A good architecture document is short on details but thick on explanation. It may suggest approaches for lower level design, but leave the actual exploration trade studies to other documents. Another type of design document is the comparison document, or trade study. This would often take the form of a whitepaper. It focuses on one specific ...
In software engineering, a software design pattern or design pattern is a general, reusable solution to a commonly occurring problem in many contexts in software design. [1] A design pattern is not a rigid structure that can be transplanted directly into source code. Rather, it is a description or a template for solving a particular type of ...
A functional specification is the more technical response to a matching requirements document, e.g. the Product Requirements Document "PRD" [citation needed]. Thus it picks up the results of the requirements analysis stage. On more complex systems multiple levels of functional specifications will typically nest to each other, e.g. on the system ...
It is the central reference point for all documentation of a service, so it contains many links to other documents. A description of the sort of information that should be kept in an SDP is found in Appendix A of the Service Design book. [1] The main categories described are: Service lifecycle plan; Service programme; Service transition plan
A design specification (or product design specification) is a document which details exactly what criteria a product or a process should comply with. [1] If the product or its design are being created on behalf of a customer , the specification should reflect the requirements of the customer or client. [ 2 ]