measuring time and effort
DESCRIPTION
Whether you’re building software, managing projects, or just driving from one place to another—you’re measuring time and effort in some way. Measuring time and effort happens in all shapes and sizes. When driving somewhere you’re most likely going on experience and deciding to leave when you assume you have enough time given a set of variables such as route, traffic, and weather. When building software the measuring is a bit more specific and likely written down somewhere in some form. But who decides how much to measure? How specific and precise to get? We’re going to dig into the varying ways to measure time and effort in a variety of contexts. Looking at our collective experiences and the experiences and teachings of those in a few different industries we will have plenty to discuss and debate on this topic. You will hopefully leave with a new perspective or idea on when, how and how much to measure. ------- Slides prepared and formatted for Refresh Savannah on Sept 16, 2014. References: - http://en.wikipedia.org/wiki/How_Long_Is_the_Coast_of_Britain%3F_Statistical_Self-Similarity_and_Fractional_Dimension - http://classes.soe.ucsc.edu/ams214/Winter09/foundingpapers/Mandelbrot1967.pdf - http://en.wikipedia.org/wiki/Coastline_paradox - http://www.stevepavlina.com/blog/2008/05/how-to-make-accurate-time-estimates/ - http://www.mindtools.com/pages/article/newPPM_01.htmTRANSCRIPT
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Measuring Time & Effort How and How Much
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How Long Is the Coast of Britain? Statistical Self-Similarity and Fractional Dimension
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“Geographical curves are so involved in their detail that their lengths
are often infinite or, rather, undefinable. However, many are statistically "self-
similar," meaning that each portion can be considered a reduced-scale image of
the whole. In that case, the degree of complication can be described by a quantity
D that has many properties of a "dimension," though it is fractional; that is, it
exceeds the value unity associated with the ordinary, rectifiable, curves.”
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How Long Is the Coast of Britain? Statistical Self-Similarity and Fractional Dimension
The Coastline Paradox
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How do we measure?
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How do we measure?
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How do we estimate?
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1. Bottom-Up
2. Top-Down
3. Comparative
4. Parametric
5. Three-point
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Estimating ➞ Measuring
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Fudge Ratio
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1. Start guestimating things
2. Write down your guestimate
3. Do
4. Write down the actual time spent
5. Calculate your "fudge ratio"
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Estimate and perform a task
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2015hrs estimated
hrs actual
1.33fudge ratio
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Estimate a task
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20hrs estimated new hrs estimated
26.61.33fudge ratio
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How much do we estimate?
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The One-Sitting Rule
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Compensate for Experience
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The 40-70 Rule
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an accurate Fudge Ratio
an appropriate unit of measurement
the optimal estimate
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Thanks!@ErikReagan @FocusLabLLC