Fp days
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Fp days Presentation Transcript

  • 1. Excel errors and how to stop them Social @tsunamiide tsunami.io Earthquake Enterprises
  • 2. Social @tsunamiide tsunami.io Earthquake Enterprises
  • 3. FPDAYS 2012  Creator of Tsunami  (F# IDE)  Big Data / Machine Learning Applied Researcher  Business Intelligence  Process Engineering Social @tsunamiide tsunami.io Earthquake Enterprises
  • 4.  Skype  moloneymb  Email  moloneymb@gmail.com  Twitter  @moloneymb  Website  http://tsunami.io Social @tsunamiide tsunami.io Earthquake Enterprises
  • 5.  FP Users?  Excel Users?  Customers with Excel?  Windows Users?  Academics? Social @tsunamiide tsunami.io Earthquake Enterprises
  • 6.  Managers / Customers like Excel  Functional Programmers like Functional Programming Social @tsunamiide tsunami.io Earthquake Enterprises
  • 7. Social @tsunamiide tsunami.io Earthquake Enterprises
  • 8.  Visit to Silicon Valley Social @tsunamiide tsunami.io Earthquake Enterprises
  • 9. VITAMINS Social @tsunamiide PAINKILLERS tsunami.io Earthquake Enterprises
  • 10. Social @tsunamiide tsunami.io Earthquake Enterprises
  • 11. Social @tsunamiide tsunami.io Earthquake Enterprises
  • 12. Social @tsunamiide tsunami.io Earthquake Enterprises
  • 13.  > 1% of formulae cells contain errors  88% of Excel spreadsheets contain errors  Large spreadsheets have > 12 errors Social @tsunamiide tsunami.io Earthquake Enterprises
  • 14. Social @tsunamiide tsunami.io Earthquake Enterprises
  • 15.  Risk Management was modelled in Excel  Run manually through copy / paste  One of the errors  Sum instead of Average -> halved reported risk Social @tsunamiide tsunami.io Earthquake Enterprises
  • 16. “Just because we’re stupid doesn’t mean everybody else was.” – Jamie Diamond Social @tsunamiide tsunami.io Earthquake Enterprises
  • 17.  Even renowned Harvard Economist make mistakes  “Growth in a Time of Debt” Reinhart and Rogoff  Failed to manually select the correct columns  Substantial effect on the outcome of the study  Incorrect advice given to government policy makers Social @tsunamiide tsunami.io Earthquake Enterprises
  • 18. Social @tsunamiide tsunami.io Earthquake Enterprises
  • 19. Social @tsunamiide tsunami.io Earthquake Enterprises
  • 20. http://www.eusprig.org/horror-stories.htm Social @tsunamiide tsunami.io Earthquake Enterprises
  • 21. EXCEL   FP 400 Million entrenched users   Substantial Existing Investment    Social @tsunamiide tsunami.io Productivity Type Safety Testability Auditability Performance Earthquake Enterprises
  • 22. Social @tsunamiide tsunami.io Earthquake Enterprises
  • 23. http://tsunami.io Social @tsunamiide tsunami.io http://www.statfactory.co.uk Earthquake Enterprises
  • 24. Social @tsunamiide tsunami.io Earthquake Enterprises