TDDs and Why you need them?

TDDs and Why you need them?

A Definitive Guide to Technical Design Documents

Technical design documents, or TDDs for short, are often created to establish detailed plans for new additions or fixes to existing technical problems. They describe the rigorous thought process that goes into the total design of a feature or a solution to an issue.

What is a Technical Design Document?

Technical design documents may also be referred to as a blueprint or a blueprint document. A blueprint document is a piece of writing describing -in depth- a project or a solution for a technical issue. For instance, if you were creating a website, a technical design document would contain details about the website's objectives, the audience it is meant for, the information architecture, the content it should have, and design choices (such as the colour scheme to employ), and the development process.

The importance

A complete blueprint of the final product's appearance may be seen in the technical design paper, down to the minor details.

  • It describes the features and operation of the product. Team members will be aware of their responsibilities and what has to be done to generate a high-quality product by having a technical design document.
  • It can act as a guide to help you assimilate the information without becoming too overwhelmed. It's a fantastic method to stay on track and keep your eyes on the goal.
  • It can help guide your team members by giving them a template to work from.
  • It is a great way to make sure your product remains consistent and retains the same level of quality throughout.

How does it help?

It might be challenging to remember every little detail when creating something new. A technical design document is a handy paper because of this. Using a technical design document, you may keep track of all your thoughts and plans so that you don't forget them when the project is being developed. Making a technical design document can seem like a big task, but with the appropriate planning, it's not as bad as it sounds. This blog post will go through all you need to know about writing a technical design document. To begin, keep reading!

How to write good TDD?

A technical design document should contain a range of information, as we've already mentioned. However, your industry will determine your document's precise format and style. Nevertheless, there are a few rules you want to follow when composing your technical design document.

  • Goal of the project - The first sentence in your technical design document should state the project's goal. Software architecture documents are distinct from technical design documents. What you want to develop and why you want to do it should both be explained in your technical design paper. If you have a deadline, it's also a good idea to mention it.
  • Audience - Who are you providing this solution for? Your intended audience should be identified in your technical design document so that you may create a solution that is appropriate for their needs.
  • Information architecture - What information will be included in the project? How is that data set structured? This can include details like the data that will be processed, pages that will be present, the content that will be displayed on pages, and the navigational methods for that content.
  • Design choices: What colour scheme will you use? Which fonts are you planning to use? What kind of material are you looking to add? Your technical design document can include descriptions of each of these choices.
  • Build procedure - How will the project be built? What equipment will you employ? Where will the project files be kept? What kind of testing will you undertake? How will you deploy this solution? Your technical design document can include all of these specifics.

Things to Include in Your TDD

As we've already mentioned, a technical design document will contain various information. Technical design documentation varies greatly. However, the following are all elements of a high-quality technical design document:

  • Executive summary - An executive summary is a summary that presents the key points of a document at the beginning. This is an effective method for providing an overview of the information contained in your technical design paper.
  • Problem statement - What prompted your decision to start this project? What is the purpose of this project? Problem statements can be a component of your technical design document's introduction. This can assist you in maintaining your attention on the primary demand for the job.
  • Audience - Who is your target audience, exactly? Why is this project necessary? What issue does it address? Your technical design document's audience section can describe the target audience's requirements.
  • Scope - How big is the project you're working on? What restrictions apply? What is excluded from the project? The scope section is a fantastic area to describe the project's constraints.
  • Information architecture - How are the various portions of your project organised, and what are they? What kind of material will be presented in the project? This can include details like the pages that will be present, the content that will be displayed there, and the navigational methods for that content.

TDDs vary depending on the organisation and team. Your TTDs can include extra details like the objective, description, definitions of key terms, specifications, constraints, and acceptance criteria, as well as information on the current state (if applicable), potential solutions, scalability and performance considerations, an overview of the architecture, and any design decisions you make along the way.


Although it may seem complicated, writing a technical design document is not as frightening as it looks. Using a technical design document, you may keep track of all your thoughts and plans so that you don't forget them when the project is being developed. Additionally, it can save you on the course, mainly if the job is big. Having a technical design document will aid in maintaining organisation. When you first begin a project, your memory is blank. However, you'll likely forget some specifics as the project progresses. A technical design document can be quite helpful in this situation. You can quickly refresh your memory without overlooking crucial elements by consulting your technical design paper.