The system is down. I can´t help you, sorry.

I´m sorry, the machine that keeps you alive during this procedure is not working. I will stitch you back up, and you can come back tomorrow. Sorry about that. – A doctor during open chest surgery Do you have a plan B or even C in case something is not working as...

Should you Test it first?

Testing your idea helps you: understand who your customers are understand the problems your customers face understand which problem your customer needs help with understand which features your customers really need to have understand which features your customer is...