2. Data Validation 2 When designing a workbook, a good design should consider who is entering the data and how important it is that the data being entered conforms to certain established rules.  SEX might be defined to only allow for “M” or “F”  RACE might be limited to “B”, “W”, “H”, “A”, “O”  Zip-Code might be defined to be a 5 digit number (US standard)  Department might be limited by a select LIST of values (Accounting, HR, Production, Audit)  Numeric Data might be defined to only be “Whole Numbers” or to be within a certain range or be bounded by limits  State or Name may be limited to a certain number of characters  Check input for a valid date or date range value What is the impact of invalid data? For Example:

3. DATA VALIDATION 3 Data Validation is used to “trap” errors at the time of Data Entry. The IF and other Logic Functions can also be used to find “errors ” Select the Range of data for the Data Validation rule RIBBON [Data] tab Data Validation There are three tabs 1) Data Validation for new rules 2) Circle Errors to identify errors that were entered BEFORE the validation rule was applied 3) Clear Circles to remove the indication of data validation exceptions. Conditional Formatting could also be applied to provide a visual for incorrect data

4. Data Validation  There are 3 tabs to a Data Validation Dialog:  {Settings}{Input Message}{Error Alert} 4 1) Allow a) What kind of data do you want to check? b) What do you want to do with “Blank” data? c) Do you want the data entry to be via the keyboard or from a “Selection Box” 2) Input Message I suggest leaving this blank since it will “repeat” for every cell. You could define two rules, 1 for the 1 st cell with a PROMPT and then another rule for the additional cells. 3) Error Processing a)STOP b)Warning c)Informational

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