1 / 32

Using Excel for Test Metrics

Using Excel for Test Metrics. Agenda. Application to Metrics Understand the numbers Types of reports Gas gauge Progress chart Defect find / fix rate. Understanding Excel Basics Text to columns and back Relative and absolute values Names CountIf / sumIf Subtotal vs consolidate

Gideon
Download Presentation

Using Excel for Test Metrics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Using Excel for Test Metrics

  2. Agenda Application to Metrics Understand the numbers Types of reports Gas gauge Progress chart Defect find / fix rate Understanding Excel Basics Text to columns and back Relative and absolute values Names CountIf / sumIf Subtotal vs consolidate Paste special Autofill Formulas – if, then Audit formulas Filter Conditional formatting

  3. Understanding Excel

  4. Basics • Auto sizing columns and rows • Entering formulas • Editing formulas • Cell formatting • View or hide formulas, gridlines, row and column headers • Hyperlinks • Worksheet / workbook relationships • Status Bar calculator • Help

  5. Text to Columns -- TO -- • Select the cells that you want to split apart (be sure the columns to the right are empty as they will be overwritten). • Click on Data, Text to Columns. • Choose Delimited. • Choose Space (or the delimiter that you are using). • Click Finish.

  6. Combining Text Fields -- TO -- • Click on a blank cell (usually to the right of the existing cells). • Type in one of the following formula examples: • =A1&" "&B1 to list first name, then a space, then the last name • =B4&", "&A4 to list last name, then a comma, then the first name • The ampersand (&) character allows you to concatenate text fields together. The quotes will show up as text as in “ “ for a space or “, “ for a comma and a space.

  7. Relative and Absolutes $ symbols in formulas allow you to “lock” a column or row. This is a must if you try to copy and paste or autofill a formula. When the cell is selected in the formula, press F4 to have it cycle between $C$R, C$R, $CR, CR

  8. Name a Cell Reference Make your formulas more “readable” by naming cells 1. Click on a cell 2. In the Formula bar where it shows the Column / Row reference, type in name and press enter. 3. Reference that name in a formula. To view the list of names, click on Insert, Name, Define

  9. CountIf / SumIf CountIf: =countif(range,criteria) SumIf: =sumif(range,criteria,[sum_range]) • Range = the range of cells you want evaluated / counted • Criteria = the criteria in the form of a number, expression, or text that defines which cells will be added. For example, criteria can be expressed as 32, "32", ">32", "apples". • Sum_range = the actual cells to sum.

  10. Subtotal vs. Consolidate • Subtotal • Dynamic (if linked to source data, when source data updates, subtotals update) • Ideal for a set number of rows (if referencing this data in another sheet) • Adjusts existing data • Consolidate • Static (no change when source data is updated) • Ideal for a varying set of rows (if referencing this data in another sheet) • Results are stored in a different location

  11. Subtotal • Select a cell in the range • Click Tools, Subtotal • Choose the reference column • Choose the function (sum, average, etc.) • Choose the column(s) to subtotals

  12. Consolidate • Select a blank cell (usually a new sheet or below the existing data) • Click Tools, Consolidate • Choose the function (sum, average, etc.) • Choose the range(s) to consolidate; click on Add after each one • Choose Left Column • Note: if you check “create links to source data,” it will do a subtotal

  13. Paste Special Accessible from the right click menu after a copy Some options available from the from the icon after a paste

  14. Paste Special • Formulas – pastes formulas only, no formatting • Values – pastes the results of the formula (can also use F9) • Formats – pastes the format (no data); can also use the format painter • Skip blanks – pastes the values of cells containing data, skips blank cells • Transpose – transposes the data – converts rows to columns or columns to rows

  15. AutoFill • Type in the first two items in a series; autofill the rest by dragging the cells • Make your own autofill lists under Tools, Options, Custom Lists • Use the CTRL to adjust the autofill • Downfall: the list is static

  16. Alternatives to AutoFill • Formulas, of course 

  17. Formulas – if / then • Use conditional statements in formulas • Error handling (avoid div/0 errors) • Create “smart” formulas that can adjust on the fly

  18. Formula Audit • Select the formula you want to audit • Click on Tools, Formula Auditing, Evaluate Formula

  19. Filter • Select a cell in the data range • Click on Data, Filter, Auto Filter

  20. Conditional Formatting • Based on the value of a cell / cells, adjust the formatting on the fly • Click the cell / cells, click on Format, Conditional Formatting • Note: trial and error is necessary in here; accepts absolute and relative values, accepts some formulas

  21. Application to Metrics

  22. Understanding Numbers • "Get your facts first, then distort them as you please." ~ Mark Twain • "Facts are stubborn, but statistics are more pliable." ~ Mark Twain • Torture numbers, and they'll confess to anything.  ~Gregg Easterbrook • 98% of all statistics are made up.  ~Author Unknown

  23. What does this mean? • Choice of formulas makes a difference • Using averages vs. totals based on number of tests will show different results • One view of numbers is never enough • %pass, %fail numbers don’t mean much if you don’t know kind of defects are logged • Numbers alone are never enough • Tests can’t cover everything • Gut feel should still mean something – sometimes numbers are hard to grasp

  24. Types of Metrics • Gas Gauge – overview of pass, fail, blocked reports • Progress Report – historical view of pass, fail, and blocked reports • Defect Find / Fix Report – how fast are we finding defects vs. how fast are they being fixed • Release Criteria – what are the criteria to release the project • Pass rate for all components must be 97% or higher • Submit rate of high priority defects must be less than x% of the average defects logged in the last x weeks. • Stress test GUI errors per 1,000 hours must be less than .02

  25. Gas Gauge

  26. How to build the gas gauge • Gather the raw data • Organize it by test area / category / test type • Create the following for each line: • % complete of planned • % pass of planned -- % pass of complete • % fail of planned -- % fail of complete • % block of planned -- % block of complete • Determine whether to use % of planned or % of complete (may use both depending on the report) • Determine whether totals should be averages or based on the actual number of tests • Develop the gas gauge

  27. Progress Chart – Ideal world

  28. Progress Chart – real world

  29. How to build the progress chart • Determine the total number of tests possible for each area • Determine milestones for 100% execution, 60% pass, 80% pass, 90% pass • Weekly, track the number of passes, fails, and blocks

  30. Find / Fix Rate – Ideal World

  31. Find / Fix Rate – Real World

  32. Find / Fix Rates • Track for all defects • Track for just high priority (must fixes for a product to ship) • Track number of defects submitted and resolved each week • Chart the results

More Related