The Most Common Mistakes People Make In Product Manager Interviews

Teresa Torres, drawing on her experience screening and interviewing product managers, outlines the most common mistakes candidates make. She argues that product management is not about personal opinion alone, that candidates must be able to justify the 'why' behind decisions, and that they should take initiative rather than wait for permission. She also warns against blaming management or constraints with 'if only' statements, and stresses knowing how success is defined and measured. Avoiding these pitfalls, she suggests, is enough to stand out from most candidates.

01Key takeaways

• Back every product opinion with data, reasoning, and openness to other people's perspectives.
• Be ready to justify the 'why' behind decisions to every stakeholder, not just the 'what'.
• Start user research now with the know-how you have rather than waiting for budget or approval.
• Understand the business context before assuming leadership is wrong; someone likely shares your view.
• Treat organizational constraints as the working environment and focus on advocating within them.
• Define what success means for a product and choose measures tied to real business goals, not vague ones like engagement.

02Key sections

Opinions must be backed up

Good product sense matters, but candidates must support their opinions with data and reasoning and show they can incorporate others' views.

Always be ready to explain why

Product work centers on the reasoning behind what gets built, and PMs must justify that reasoning to executives, engineers, sales, and marketing.

Take initiative on research and avoid blaming others

Candidates should stop waiting for permission or budget to do user research and avoid complaining that management or the company is wrong, since this signals weak business context and advocacy skills.

Stop saying 'if only'

Constraints such as unreliable estimates, weak designers, or overpromising sales are the working environment, and complaining about them suggests a candidate doesn't truly want the role.

Define and measure success

Strong candidates start with the end in mind, can explain what success looks like for a product, and identify concrete metrics tied to business outcomes.

03From the post

“This post is part of the So You Want To Be a Product Manager series. There are a ton of great articles about what you might get asked in a product manager interview. I refer you here, here, and here. I've also written about what I always ask during”

Summary and takeaways written by PM Atlas; quotes are short excerpts. © the original author.