Previous experiences and historic data should be a good and useful resource to provide a baseline for time estimate and resource utilization- on a case by case basis using the baseline to enhance and adjust your estimate is of course the best practice but deriving it from Something your already experienced is preferred

To meet tight deadlines historical data is your friend! Analyze testing times from similar past projects to estimate effort for your current project. But adjust for differences! New features, complexity, or testing tools might change the equation. Account for these variations and add a buffer (10-20%) for surprises. This historical data + adjustments approach helps create a more accurate testing time estimate for ETA's . One advice is review your ETA's from your senior or QA manager to gain their confidence also

To accurately estimate testing time, break down tasks into smaller, more manageable units and leverage historical data from previous projects for reference. Utilize estimation techniques such as expert judgment, analogous estimation, or parametric estimation. Regularly communicate with the testing team to identify any potential roadblocks and adjust estimates accordingly to meet project deadlines.

To accurately estimate testing time and meet project deadlines, thorough scope analysis is essential. This involves breaking down the project into smaller, manageable tasks, considering factors like complexity, dependencies, and resources. Historical data from previous projects can provide insights into similar testing efforts. Collaborating with the development team to understand changes and updates can also refine estimates. Additionally, using testing metrics and tools for tracking progress helps in adjusting timelines as needed. Regularly revisiting and updating the scope analysis ensures a realistic testing schedule aligned with project deadlines.

Projects History: Analyze past projects similar in features and testing levels. Their testing effort (time) becomes a baseline for your current project. Remember, this is just a starting point. Account for any significant differences in complexity, new functionalities, or testing tools that might affect your project's specific testing needs.

Progress tracking plays a vital role in refining testing time estimates for deadlines. Here's how: Test Strategy: Leverage the initial testing time estimate established in your Test Strategy, likely based on historical data. Monitor Progress: Track testing progress against the estimated timeline. This allows you to identify deviations early on. Identify Deviations: Analyze any difference between planned progress and actual progress. Adjust Estimates: If deviations are significant, re-evaluate testing efforts and adjust the estimated time to reflect actual testing needs. Transparency: Communicate adjustments to stakeholders to ensure deadlines. By actively monitoring progress and adapting estimates as needed, you can meet project deadlines.