Software design documents help to ensure the design specs of the software are understood and it's clear to all what is possible and how it can be accomplished.
Software design documents are an important way of looping everyone into the process who is involved in product. It i everyone understand what is possible, what is not possible and the system that will be designed.
Introduction: Provide an overview of the entire document
System Overview: Provide a general description and functionality of the software system.
Design Considerations: Describe the issues that need to be addressed before creating a design solution
Architectural Strategies: Describe the strategies that will be used that will affect the system.
System Architecture: This section should provide a high-level overview of how the functionality and responsibilities of the system were partitioned and then assigned to subsystems or components.
Policies and Tactics: Describe any design policies and/or tactics that do not have sweeping architectural implications (meaning they would not significantly affect the overall organization of the system and its high-level structures).
Detailed System Design: Most components described in the System Architecture section will require a more detailed discussion. Other lower-level components and subcomponents may need to be described as well.
Glossary: An ordered list of defined terms and concepts used throughout the document.
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Recommended power links and files you can add to your software design documents: