"This unit defines the competency required to analyse, design, implement and review the customisation of packaged software applications, using simple programming constructs."
Basically, that means ... (translate above into plain english)
If you are demonstrating this unit as part of a formal course, you might find that the unit is graded (meaning you can not only demonstrate your competence, but can also gain a credit or distinction). Your facilitator may already have set criteria that your college uses. If not, here are some ideas for possible credit/distinction activities that you can discuss with your facilitator: