Maintainability Index Formula in Visual StudioRSS

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  farooqspecia...

  Member

  46 Points

  90 Posts

  Maintainability Index Formula in Visual Studio

  Oct 14, 2017 01:24 AM|farooqspecials|LINK

  The original formula:

  MI = 171 - 5.2 * ln(V) - 0.23 * (G) - 16.2 * ln(LOC)

  The derivative used by SEI is calculated as follows:

  MI  = 171 - 5.2 * log2(V) - 0.23 * G - 16.2 * log2 (LOC) + 50 * sin (sqrt(2.4 * CM))

  The derivative used by Microsoft Visual Studio (since v2008) is calculated as follows:
  

  MI = MAX(0,(171 - 5.2 * ln(Halstead Volume) - 0.23 * (Cyclomatic Complexity) - 16.2 * ln(Lines of Code))*100 / 171)

  The threshold values are different for different formula. As visual studio is considering below 20 as poor maintainability and  maintainability derivative used by SEI is calculated below 60 as poor maintainability value. Why there are different formulas for maintainability index. . They should be same..

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  Billy Liu

  Contributor

  2230 Points

  815 Posts

  Re: Maintainability Index Formula in Visual Studio

  Oct 16, 2017 03:16 AM|Billy Liu|LINK

  Hi farooqspecials,

  farooqspecials

  Why there are different formulas for maintainability index. . They should be same..

  Do you mean the there is not need to have 3 formulas for  maintainability index?

  I think these formulas are improved by different organizations.

  They improve the formulas by the way which they think is better to show the maintainability of codes.

  So there are different version for  maintainability index.

  Best Regards,

  Billy

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