5. Input design

This part of the systems requirement document sets out what and how inputs are loaded into the system.

For example, it may lay out the input order form along with validation checks required for each field entry.

The order form may be screen based or paper based. It may need to support multiple languages. It may need to support visually impaired or deaf persons.

One way of doing this is to set up the form visually along with explanatory text, as shown below

Simple Input form


1. Labels. Font Arial, 12 point (size adjustable with a separate control)

2. Text field, max 30 characters, only alphanumeric characters allowed, required field.

3. Price field. Has to be in £00.00 format, max value £99.99, min value £00.01 Needs to be able to handle $ as well.

The development team can take this type of input specification and set up the interface and code as needed.


Challenge see if you can find out one extra fact on this topic that we haven't already told you

Click on this link: Interface design


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