Once you have completed your design ideas you MUST complete an evaluation of your ideas matched against your Design Brief (what you originally stated you wanted to do) and your Design Specification. You could presentthis in the form of a table with ratings of each idea matched against the specification point. You would then add up the totals of each idea to see which are the highest rated and most closely match your Design Specification. You should then select one of the highest rated ideas to develop.
The example below starts by taking a screenshot of all of the ideas and then labelling them so that they can be identified in an Evaluation table.
A table is created for the most relevant Design Specification points (note that not all specification points are used at this stage) and a rating out of 10 is given to each idea and how well it meets that sepcification point. You should then total up the scores which should highlight the best