09-02 Contents: Modelling Manifesto, Conferences, 30 years of spreadsheets, cold-hearted utility
ISSN 1649-2374 This issue online at http://www.sysmod.com/praxis/prax0902.htm [Previous] [Index] [Next]
Systems Modelling Ltd.: Managing reality in Information Systems - strategies for success | |
IN THIS ISSUE |
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1) IT Risk The Financial Modeler's manifesto |
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2) Quality 20% Discount on Software Testing Conference Dublin 4 March |
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3) Spreadsheets Thirty Years of spreadsheets Ray Butler and Patrick O'Beirne at EuroCACS Frankfurt 15 March 2009 VBA + Excel Performance: MS asks for your Feedback |
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4) Off
Topic Michigan man freezes to death after electric company cuts power |
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10 Web links in this newsletter |
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About this newsletter and Archives Disclaimer Subscribe and Unsubscribe information |
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Both John Dvorak in the US and Paul Wilmott in the UK are
reminding people of the limitations of financial models. My book
"Spreadsheet Check and Control" and the Spreadsheet Safe (tm) syllabus
both require a developer to document assumptions and limitations.
Patrick O'Beirne
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http://www.pcmag.com/article2/0,2817,2338796,00.asp
The 30th Anniversary of the (No Good) Spreadsheet App
This is what caused the mortgage crisis: Spreadsheets
instead of people were making decisions on loans. Soon these loans were
wrapped up into neat financial packages all based on spreadsheet
accounting. Brokers gave these packages high, triple-A financial
ratings because the spreadsheet told them to. All spreadsheets, except
the most mundane, are flawed in one way or another. You guess what the
growth rate might be. You guess at the future cost of goods. You play
what-if until you get what you want. There's a lot of guessing games
played with spreadsheets. This is a flaw.
Discussion: http://discuss.pcmag.com/forums/1004414259/ShowPost.aspx
http://www.dvandusen.com/visicalc_story/index.htm
Dennis Alan Van Dusen The Structured Analysis Resulting in VisiCalc
"The design of the spreadsheet actually was done at TI and leaked to
Personal Software (later called Visicorp) after [Dennis] interviewed
Dan Fylstra and offered him a job at TI (he persuaded me to join him
instead, then .... (long story there, not all good...)."
http://www.guardian.co.uk/media/2009/jan/18/visicalc-apple-software-bricklin
Spreadsheets serve as weapons of mass cost destruction
John Naughton
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This one-day
workshop:
Offers a comprehensive approach to auditing spreadsheets.
Uses real-world examples and hands-on learning to demonstrate the
benefits of such an approach.
The participant will
learn more about:
Where to start and the most efficient techniques to use
How to cut down a system of spreadsheets to a manageable audit task
The symptoms that indicate potential or actual problems
How an enterprise can create an inventory of its critical spreadsheets,
assess them for risk and prioritise scarce resources
Little-known secrets of Excel's auditing features
The causes of spreadsheet errors
The risk environment and processes around spreadsheet use
Techniques for inspecting a spreadsheet for errors
Techniques to reduce the incidence of errors in spreadsheets
What to look for in software tools
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http://blogs.msdn.com/excel/archive/2009/01/06/vba-excel-performance-your-feedback-requested.aspx
The
Excel development team is currently investigating a number of scenarios
where VBA macros take longer to run in Excel 2007 than in earlier
versions (i.e. Excel 2003). They are looking
for code/workbook/steps
to reproduce the issue.
www.sysmod.com/scc.htm Our offer - free shipping to EU .
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Simply send your comments to FEEDBACK (at) SYSMOD (dot) COM
Thank you! Patrick O'Beirne, Editor
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This from the Risks Digest is just so sad:
http://www.mlive.com/news/bay-city/index.ssf/2009/01/autopsy_bay_city_man_froze_ins.html
In this case the risk appears to be the assumption that anyone who
wishes to pay their electric bill can do so easily. The 93-year-old
WWII veteran may
not have had a checking account, a computer, or online bill paying, and
the weather was too severe for him to leave home to pay his electric
bill in
person. After his death, a large amount of cash was found clipped to
his utility bill on his kitchen table.
The Michigan Attorney General's Office is reviewing Schur's death.
"Situations like this should be avoidable," Matt Frendewey, spokesman
for the Attorney General's Office, told the Detroit Free Press for a
story published today. A limiter, placed outside Schur's home adjacent
to his electric meter, restricts the amount of electricity reaching the
residence. If a home owner tries to draw more electricity than allowed
by the limiter, the device cuts off all electricity to a home until the
home owner resets the device. Neighbors said Schur struggled to hear,
and may have suffered from some amount of dementia. City officials said
they don't believe a city worker ever made one-on-one contact with
Schur to explain the limiter's operation.
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