Stop – the user is prohibited from inputting the erroneous dataĢ.
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In addition, there are three action choices: 1.
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DESKRIPSI SISTEM INFORMASI PENJUALAN PLUS
The message can have a title, plus as much text as desired. Publishing as Prentice Hallįinally, the “Error Alert” tab can be used to create a meaningful error message whenever user data violates the constraints:ġ0-7 © 2011 Pearson Education, Inc. Once the processing integrity control has been designed, the “Input Message” tab can be used to create a message explaining the permissible input values that will appear whenever a user selects that cell:ġ0-6 © 2011 Pearson Education, Inc. Publishing as Prentice HallĬustom – formulas can be used to limit input valuesįor example, we can create a “reasonableness test” that requires cell C2 to be less than or equal to 10 times the value in cell B2 as follows: Time – only time values Text Length – length of text stringĬhoosing either Date, Time, or Text Length yields the same set of choices as for “whole numbers” or “decimals”, making it easy to create limit checks, range checks, size checks, etc.:ġ0-5 © 2011 Pearson Education, Inc. ĭate – only date values 10-4 © 2011 Pearson Education, Inc. If the “In-cell dropdown” box is not checked, users will still be restricted to entering values from the list indicated in the source box, but will have to manually type in those values rather than selecting from a drop-down menu. The list of permitted values in the drop-down box can be found in the portion of the spreadsheet as indicated in the “Source” box If the “In-cell dropdown” box is checked, the values will appear in a drop-down list when a user clicks on that cell. The list of permissible choices can appear in a drop-down menu (if that box is checked) using values found in a set of cells in the spreadsheet (using the source field): List – permissible values must be selected from a list that the control designer creates Click the drop-down arrow in the Data box to reveal other types of tests that can be created: 10-3 © 2011 Pearson Education, Inc. This default window can be used to create a “range check” with minimum and maximum values. input) without restrictions Whole numbers only allowed Decimals allowed (but not required)Ĭhoosing either whole numbers or decimals, yields the following additional choices: Publishing as Prentice HallĪny value (the cell can take numeric, text, date, etc. This brings up the following window, which can be used to design a variety of processing integrity controls that will apply to the currently selected cell (in the example above, the Data Validation controls will be applied to cell C2):Ĭlicking on the drop-down arrow in the “allow” box yields the following choices: 10-2 © 2011 Pearson Education, Inc.
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10: Information Systems Controls for Systems Reliability – Part 3: Processing Integrity and AvailabilityĬlick on “Data Validation” and then choose the option “data validation”: The Data Validation tool is found on the “Data” tab, as shown below:ġ0-1 © 2011 Pearson Education, Inc. Therefore, this brief introductory tutorial may be useful as a hand-out prior to assigning the Excel questions in this chapter.
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Some students will already be familiar with this tool, others will not. CHAPTER 10 INFORMATION SYSTEMS CONTROLS FOR SYSTEMS RELIABILITY – PART 3: PROCESSING INTEGRITY AND AVAILABILITY SPECIAL INTRODUCTION TO EXCEL This chapter includes a number of problems that use Excel’s built-in Data Validation tool to help students better understand processing integrity controls by programming them in a spreadsheet.