CIRCLES vs GO vs JTBD: PM Product Sense Framework Guide (2026)

The 3 Frameworks

• ●CIRCLES (Lewis Lin): 7 steps for designing a product. Comprehend situation, Identify user, Report needs, Cut down, List solutions, Evaluate, Summarize.
• ●GO (Goal-Observation): Start from the goal of the product, state the key observation about users, propose solutions in 2 tracks (quick win, strategic).
• ●JTBD (Clayton Christensen): Identify the job a user is hiring the product to do. Design around that job, not around features.

When Each Framework Actually Works

• ●CIRCLES is best for: APM/L4 candidates, greenfield design questions, candidates without strong product intuition.
• ●GO is best for: Senior PM candidates, improvement questions ("improve X"), and when the interviewer has already stated a goal.
• ●JTBD is best for: Ambiguous consumer product questions, strategy questions, and any time you want to stand out from framework-reciting candidates.

The CIRCLES Trap for Senior PMs

Director-level interviewers have seen CIRCLES thousands of times. They hear the cadence in the first 20 seconds ("Let me first comprehend the situation"). When a senior candidate uses CIRCLES, interviewers interpret it as a signal of shallow product intuition. The candidate is using scaffolding to hide lack of judgment. The fix is not to avoid frameworks. It is to internalize them deeply enough that you stop narrating them.

Worked Example: CIRCLES Applied to "Design an Alarm Clock for the Visually Impaired"

Comprehend: Greenfield design. Assume we have engineering, design, a 90-day MVP window, and $200K budget. Identify user: Segment by severity (low vision, blind). Pick blind users. Within blind, split by age and tech comfort. Pick working-age adults with smartphones. Report needs: Reliability, easy setup, tactile or audio interface, affordable. Cut: Pick reliability and audio-first as the top 2. List solutions: Voice-triggered alarm with 3-tap snooze, tactile button with escalating audio, paired smartphone app with haptic wristband. Evaluate: The smartphone-paired wristband scores highest on feasibility and user-need fit. Summarize: Ship smartphone-paired wristband MVP at $45 price point, with voice setup and an escalating audio-plus-haptic alarm.

Worked Example: GO Applied to "Improve Instagram for Small Business Owners"

Goal: Help small business owners convert Instagram attention into revenue without needing a marketing team. Observation: Small business owners post content regularly but do not know which posts drive sales because attribution between content and DM conversations is broken. Quick win: Tag-your-products inline on reels with attribution back to checkout. Strategic: Build an AI assistant that reads a business owner's last 30 days of DMs, classifies high-intent ones, and drafts responses with direct purchase links. This sits at the intersection of content and commerce, which is Instagram's structural advantage.

How Interviewers Spot Scripted Framework Use

• ●You announce the framework name before starting ("I will use CIRCLES").
• ●You transition with the framework-specific vocabulary ("let me now cut down").
• ●You give equal time to every step, even when the question does not need it.
• ●You skip user-specific empathy and jump straight to feature ideation.

How to Internalize a Framework

Do 30 product design drills with CIRCLES on paper. Then do 30 more and never announce the framework, just follow the logic. Then switch to GO and do 10 more. Then let go of all three and run 10 with just: user, need, solution, trade-off, recommendation. If your product sense holds up without the framework, you have internalized it. If not, you are still reciting.

Practice Product Sense Without Scripts

ZeroPitch runs a product sense room that detects scripted framework use and rewards candidates who lead with user insight. See also our product sense interview questions guide.