| 4.1.4 Validation & Verification |
| Last update 03 June 2009 - FatMax |
In this topic you'll need to know how data errors occur. You should be able to explain the purpose of validation (and uses of the common types of validation) and the purpose of verification.
| Key Points/Learning Outcomes |
By the end of this topic you should:
- understand how data errors can occur during input, transcription, processing and transmission
- be able to define and understand the purpose of validation, including the following types:
- presence,
- format,
- range,
- data type,
- fixed value,
- check digit;
You also need to be able to define and understand the purpose of verification, including the following types: double entry, proof reading, sending back printouts. |
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Below you can find some resources to help you with your planning, revision or idle curiosity. Note: none of these are endorsed by WJEC
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| FatMax powerpointy thing covering the key points for this topic. Very good if I do say so myself! |
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| Couple of sample questions that could be useful as a homework/revision exercise or as an introduction to parts of this topic.. |
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| Mini site from Teach_ICT covering all aspects of validation and verification. |
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| Handout covering the difference between vaildation and verification from the very very nice people at OCRICT. |
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| Alternative ppt from Rob Cawley. Concentrates mainly on why validation and verification are necessary. Very good!!! |
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| Steve Longley's excellent Flash notes for validation and verification. Right click and save link as / save target as |
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| Interactive revision diagram type thingy created using Interactive Diagram from content generator. |
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| Set of basic notes on validation and verification from the WJEC INSET CD. |
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| The focus of this ppt is more how/why errors occur. It's worth a look 'cos it's slightly different and because I "wrote" it!!! |
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| Teachers might find these useful for setting homeworks etc. Use with care as they're based on the spec. for another board!!! |
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| You need a password to open this file. If you can prove you're a teacher (or have lots of biscuits to offer) mail me for the password. |
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| Books/Reading |
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| See the books page or follow the links for more details about the titles listed below |
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- Mott & Leeming - pages 18 - 29
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| Sample Question |
Errors in data can occur during data collection, data entry and data processing.
Describe how each of these three types of error could occur.
More sample questions and answers are available here |
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| Bookmark FatMax |
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| Books for 4.1.4 |
ICT Through Diagrams
Alan Gardner
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Essential ICT for WJEC
Stephen Doyle |
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WJEC ICT
Mott & Leeming |
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| Other IT1 Topics |
Choose a topic from the list below for more IT1 stuff
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