Info 1 Topic 3: Design of Solutions
- Created by: Steph162810
- Created on: 23-04-15 17:01
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- Design of Solutions
- Design Tools
- Provided in the software application that you see to solve the identified problem
- Sometimes there is more than one software package that could solve a problem.
- The software package with the most appropriate features will be chosen by the designer.
- Design of Data Entry into ICT systems
- Techniques
- Data entry forms
- Video capture and transfer
- Audio capture and transfer
- Automatic input
- Verfication
- Ensures datat is correctly transferred or entered into a computer from the medium that it was originally stored on.
- Barcode Verification
- Check digit- A digit attached to the end of a string of digits. If a digit is misread the check digit calculation will be in error.
- Manual Entry
- On-Screen Prompts
- Entered data is redisplayed on the screen. The user needs to confirm that all of the data is correct, otherwise they need to retype it.
- E.g: On-line shopping transactions
- Dual Input
- Data entered by a keyboard is typed in twice by different people. The two copies of the data are compared. If the two copies agree it is assumed the the data is correct.
- On-Screen Prompts
- Validation
- Automatic check made by a computer to ensure that any data entered into the computer is valid and sensible.
- Methods of Validation
- Presence Check
- Checks that data has been entered into a field, and not left blank.
- Type Check
- Checks that an entered value is of a particular type. E.g: Currency
- Length Check
- Checks that data is no longer than a particular number of characters. E.g: Mobile number
- Range Check
- Checks that an entered value falls within a particular range. E.g: 1-9
- Format Check
- Checks that an entered value has a particular format. E.g: Postcode
- Presence Check
- Techniques
- Design of Output of Information
- You should design the required output prior to deciding what the processing necessary for that solution is
- Output hardware devices
- Chosen and justified
- Output format
- On screen display
- Printed hard copy
- Sound/ video clip
- Design of Processes
- In designing solutions it is useful to decide on what processes are to be used.
- If the processes are specified exactly, it makes it possible for a 3rd party to implement the system.
- Processing required for a solution depends on the software application used.
- Website Design
- Image manipulation
- Detail of data entry
- Insertion of external hyperlinks
- Insertion of internal hyperlinks
- Features like CSS
- Communication
- Spreadsheet
- List of all the formulae used for calculation
- Sorting and filtering data
- Macro programming
- Any logical functions
- LOOKUP function
- Detail of validation checks
- Website Design
- Produce Designs for Implementation by a Third Party
- Essential that the designer produces sufficient documentation and notes to allow the system to be implemented by someone else.
- The system is not always analysed, designed and implemented by the same person.
- Design Tools
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