Can you help me with how I might justify switching to induction - a more expensive method than flame?

Flame is an operator dependent process.

You must be smart and alert all the time when using a flame to get the same result. Induction simply involves pressing a button. So a flame costs less, but induction offers many advantages.  We had one instance where a company saw an operator’s consistency fall off during the day. With induction you’ll get repeatability you won’t get with a flame, making it a great option when consistency of critical.