none of the above ([info]aisa0) wrote,
@ 2008-10-03 16:50:00
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Entry tags:sunflower river

Bridge Building at Sunflower River.

[Alan in acequia]

At our last work party, we built a bridge over our acequia. [info]appleang took a spectacular set of photos that we've uploaded to our community blog.

I was "point" on this project, meaning it was my responsibility to do advance planning and be able to answer questions about what we were doing during the day.

Prior to our work party, I put together a timeline and a description of each phase of the work project. I had twice the number of people I estimated we'd need, and it took us twice as long as the estimate suggested.

I was off, then, by 4x my original estimate. I failed to account for one major task that came up on the actual work day, and several tasks took less time than I imagined. Almost all of the time overrun was underestimating how long it takes to dig. We started the process of estimating in part to collect data about what things we did poorly at estimating. Nom data.

All the same, we got our bridge built!



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[info]ravendisplayed
2008-10-04 03:14 pm UTC (link)
For time estimates, I find I'm most accurate if I use a x2x2 method. I double my initial estimate, and use that as my internal estimate. I then double that for use as my external estimate. I find that if it is a task I've had a lot of experience with, and I can reasonably limit interruptions it gets close to the x2 estimate. If not, its the x4.

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