A project aims to deliver a means of enabling the inhabitants of an archipelago to vote via the Internet. Although the technology exists to provide Internet coverage for the islands, it is notoriously difficult (and therefore expensive) to provide robust coverage because of the remote location.
Two of the requirements captured from stakeholders are provided below:
1. The solution shall provide all inhabitants with the ability to register and vote for a presidential candidate.
2. All voters shall receive an email confirmation that their vote has been registered within 2 minutes of voting.
Which requirements filter will be particularly relevant in requirements analysis?