This video from Texavi's Pardha Mantravadi highlights the best practices around estimating the size, effort and schedules in agile software product engineering projects. It sets out the do's and don'ts during the early stage of scoping in and/or scoping out and moves on into the important aspect of considering team's productivity. We will also touch upon the relative estimation and why this is more practical, easy to use and effective when it comes to developing software products using agile methodologies i.e., Scrum, XP, Lean, Scaled Agile Framework (SAFe) etc.
Tee shirt sizing as it is popularly called is a very effective technique used by agile teams is a great example of relative estimation. Planning poker is another tool deployed by the teams in the agile projects. Watch the video to learn the best practices of relative estimation in the software development projects.

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