The cascading structure of typical spreadsheet formulae means that just about every spreadsheet is almost certainly wrong.
Spreadsheets can be considered to be the world's most successful end-user programming language. Spreadsheet formulas are Turing complete.
Once information is loaded into a spreadsheet, it acquires properties that it may not deserve – a process called reification.
95% of all spreadsheets contain errors. So, it is almost certain that your spreadsheets are wrong.
Solver Max provides a collection of optimization model examples in Excel (using the Solver and OpenSolver add-ins) and Python.
Spreadsheets have errors like dogs have fleas. Nine out of every ten spreadsheets suffer some error, and consequences can be severe.
We are conscious of very few of our errors. When people are confronted with their actual error rates, they are typically shocked.
See our bibliography of spreadsheet best practice, risk management, errors and testing, and methods for improving spreadsheets.
We can help you make better spreadsheets:
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