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Calculate a duration from times that have gaps and overlaps

Our take

Calculating task durations from overlapping and non-overlapping time entries can be challenging, especially when dealing with multiple entries for each person. To effectively assess the total time worked, you'll need a method that accounts for overlaps while summing distinct durations. For straightforward cases, simply add the time segments. However, for those with overlaps, consider using the minimum start time and maximum end time. With the right formula, you can streamline this process for an entire column.

In the world of data management, the ability to calculate task durations accurately, especially when faced with overlapping times and gaps, is crucial for productivity and resource allocation. In a recent discussion, a user posed a common challenge: how to compute task durations from a dataset of start and stop times that include overlaps and gaps. This situation resonates with many professionals who rely on spreadsheets for scheduling and time tracking. The complexity of this task highlights the need for innovative solutions that simplify these calculations, underscoring the shift from traditional spreadsheet methods to more advanced, AI-native technologies. As we explore this topic, we can also draw parallels to other common spreadsheet challenges, such as Can't change x axis labels in my scatter plot and Function that references a cell but the referencing cell's value isn't being used when it's evaluating the function and the cells name is being used.

Calculating durations with gaps and overlaps is not merely an academic exercise; it has profound implications for time management and operational efficiency. The traditional approach of summing durations works seamlessly for non-overlapping intervals, but as the user noted, it quickly becomes complicated when overlaps are present. A straightforward formula that accounts for the minimum start time and maximum end time can simplify calculations, yet it often requires more sophisticated handling for cases with multiple overlaps and gaps. This complexity can lead to frustration and inefficiencies, highlighting the necessity for tools that empower users to navigate these challenges effortlessly.

From a broader perspective, this scenario illustrates a pivotal moment in data management. As businesses increasingly rely on data to drive decisions, the demand for intuitive, user-friendly solutions is more pronounced than ever. The spreadsheet is evolving, and users are seeking ways to transition from cumbersome, manual calculations to streamlined processes that harness the power of AI and automation. Embracing innovative tools not only enhances productivity but also fosters a more human-centered approach to data management, allowing users to focus on insights and outcomes rather than getting bogged down by technical intricacies.

As we look to the future, the emphasis on developing accessible solutions that cater to the needs of all users is crucial. The challenge presented by overlapping time intervals is just one of many that can be addressed with thoughtful design and intelligent technology. It invites us to consider how we can continue to evolve our tools to meet the dynamic needs of users, making them not only more powerful but also more intuitive. The question remains: how will we leverage these advancements to create a more seamless experience for users, allowing them to unlock the full potential of their data? As we continue to explore these developments, one thing is clear: the future of data management lies in empowering users to transform their workflows and outcomes through innovative solutions.

I have this data of start and stop times. I want to calculate the duration of the task for each person. But overlapping times don't count. Calculating for some people is easy. If they have no overlaps, it could be the sum of the durations. For some that overlap, I could take the min start to the max end.

But there can be an arbitrary number of data points, and there can be any number of overlapping times and any number of gaps. What can I do for the duration for the more complicated ones? And of course I want one formula for the whole column. Thanks for any ideas.

All times are on the same day. They are actually datetimes, just displayed as times, so even if they were not on the same day, any math your come up with would work correctly.

Name Start End Duration

Person 1 6:39 PM 7:02 PM

Person 1 8:02 PM 8:10 PM

Person 2 6:32 PM 9:08 PM

Person 3 6:25 PM 7:02 PM

Person 3 6:32 PM 9:06 PM

Person 3 7:02 PM 8:13 PM

Person 4 7:01 PM 7:59 PM

Person 5 6:47 PM 8:43 PM

Person 5 8:43 PM 8:54 PM

Person 6 6:45 PM 9:08 PM

Person 7 7:02 PM 8:12 PM

Person 7 7:17 PM 7:20 PM

Person 8 6:56 PM 8:13 PM

Person 9 6:32 PM 8:55 PM

Person 9 6:32 PM 8:52 PM

Person 10 6:38 PM 8:55 PM

ETA: Expected output

Name Duration

Person 1 0:31

Person 2 2:36

Person 3 2:41

Person 4 0:58

Person 5 2:07

Person 6 2:23

Person 7 1:10

Person 8 1:17

Person 9 2:23

Person 10 2:17

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