Idea heuristics: Methodology for evaluating a product vision

Being a software developer gives me the power to create, but oftentimes I get stuck when it comes to developing an idea beyond the initial conceptual "I could build X, Y and Z". I am looking for business people to chime in here, but what are the steps to evaluating the market and feasibility of a potential software business?

I often think to myself:

• Is it niche enough for a small venture?
• Who is my market? is it B2C or B2B?
• How can it be monetized?
• Does it solve a common problem in a novel and minimalist way?
• Do I feel passionate about it?
• What kind of expertise is required from an engineering standpoint? From a business standpoint?

But those questions only get me so far. What kind of steps can I take to evaluate an idea more successfully? I am ready to start indiehacking, I just don't want to pour hours into a concept that hasn't been evaluated in a business/marketing way...