Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Measuring Time & Effort 
How and How Much 
Refresh Savannah @ErikReagan
Refresh Savannah @ErikReagan
Refresh Savannah @ErikReagan
Refresh Savannah @ErikReagan
How Long Is the Coast of Britain? 
Statistical Self-Similarity and Fractional Dimension 
Refresh Savannah @ErikReagan
“Geographical curves are so involved in their detail that their lengths 
are often infinite or, rather, undefinable. Howev...
Refresh Savannah @ErikReagan
Refresh Savannah @ErikReagan
How Long Is the Coast of Britain? 
Statistical Self-Similarity and Fractional Dimension 
Refresh Savannah @ErikReagan
The Coastline Paradox
How do we measure? 
Refresh Savannah @ErikReagan
How do we measure? 
Refresh Savannah @ErikReagan
How do we estimate? 
Refresh Savannah @ErikReagan
1. Bottom-Up 
2. Top-Down 
3. Comparative 
4. Parametric 
5. Three-point 
Refresh Savannah @ErikReagan
Estimating ➞ Measuring 
Refresh Savannah @ErikReagan
Fudge Ratio 
Refresh Savannah @ErikReagan
1. Start guestimating things 
2. Write down your guestimate 
3. Do 
4. Write down the actual time spent 
5. Calculate your...
Estimate and perform a task 
Refresh Savannah @ErikReagan
20 
15hrs estimated 
hrs actual 1.33fudge ratio 
Refresh Savannah @ErikReagan
Estimate a task 
Refresh Savannah @ErikReagan
20 hrs estimated new hrs estimated 1.33 26.6 fudge ratio 
Refresh Savannah @ErikReagan
How much do we estimate? 
Refresh Savannah @ErikReagan
Refresh Savannah @ErikReagan
The One-Sitting Rule 
Refresh Savannah @ErikReagan
Compensate for Experience 
Refresh Savannah @ErikReagan
The 40-70 Rule 
Refresh Savannah @ErikReagan
an accurate Fudge Ratio 
an appropriate unit of measurement 
the optimal estimate 
Refresh Savannah @ErikReagan
Thanks! 
@ErikReagan @FocusLabLLC 
Refresh Savannah @ErikReagan
Upcoming SlideShare
Loading in …5
×

Measuring Time and Effort

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.htm

  • Be the first to comment

  • Be the first to like this

Measuring Time and Effort

  1. 1. Measuring Time & Effort How and How Much Refresh Savannah @ErikReagan
  2. 2. Refresh Savannah @ErikReagan
  3. 3. Refresh Savannah @ErikReagan
  4. 4. Refresh Savannah @ErikReagan
  5. 5. How Long Is the Coast of Britain? Statistical Self-Similarity and Fractional Dimension Refresh Savannah @ErikReagan
  6. 6. “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.” Refresh Savannah @ErikReagan
  7. 7. Refresh Savannah @ErikReagan
  8. 8. Refresh Savannah @ErikReagan
  9. 9. How Long Is the Coast of Britain? Statistical Self-Similarity and Fractional Dimension Refresh Savannah @ErikReagan
  10. 10. The Coastline Paradox
  11. 11. How do we measure? Refresh Savannah @ErikReagan
  12. 12. How do we measure? Refresh Savannah @ErikReagan
  13. 13. How do we estimate? Refresh Savannah @ErikReagan
  14. 14. 1. Bottom-Up 2. Top-Down 3. Comparative 4. Parametric 5. Three-point Refresh Savannah @ErikReagan
  15. 15. Estimating ➞ Measuring Refresh Savannah @ErikReagan
  16. 16. Fudge Ratio Refresh Savannah @ErikReagan
  17. 17. 1. Start guestimating things 2. Write down your guestimate 3. Do 4. Write down the actual time spent 5. Calculate your "fudge ratio" Refresh Savannah @ErikReagan
  18. 18. Estimate and perform a task Refresh Savannah @ErikReagan
  19. 19. 20 15hrs estimated hrs actual 1.33fudge ratio Refresh Savannah @ErikReagan
  20. 20. Estimate a task Refresh Savannah @ErikReagan
  21. 21. 20 hrs estimated new hrs estimated 1.33 26.6 fudge ratio Refresh Savannah @ErikReagan
  22. 22. How much do we estimate? Refresh Savannah @ErikReagan
  23. 23. Refresh Savannah @ErikReagan
  24. 24. The One-Sitting Rule Refresh Savannah @ErikReagan
  25. 25. Compensate for Experience Refresh Savannah @ErikReagan
  26. 26. The 40-70 Rule Refresh Savannah @ErikReagan
  27. 27. an accurate Fudge Ratio an appropriate unit of measurement the optimal estimate Refresh Savannah @ErikReagan
  28. 28. Thanks! @ErikReagan @FocusLabLLC Refresh Savannah @ErikReagan

×