Voice of Customer (VOC) Collection, Analysis and Insights

Voice of the Customer (VOC) is a structured methodology that systematically captures, analyzes, and translates qualitative and quantitative customer feedback into actionable insights to guide product innovation, process improvement, and strategic decision-making.

7 katas, in the order they are used. Each is free, open-licensed, and comes with a companion guide.

1. Step 1

   Voice of the customer

   Voice of the customer (VOC) collection plan

   Which methods, owned by whom, how often, keep the VOC evidence log fed — a real plan tying interviews, gemba sessions, and other collection activities to the specific questions you want VOC evidence to answer.

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2. Step 2

   Voice of the customer

   Voice of the customer (VOC) evidence log

   A running log of customer quotes and observations, each tagged with a theme — drafted for you, yours to edit — so you can see at a glance which few things customers are actually telling you, not just a pile of unsorted notes.

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3. Step 3

   Voice of the customer

   Customer interview guide

   A topic-by-topic question bank for a general customer-discovery interview — open-ended questions with real follow-up probes, drafted from your research goal and yours to edit before you take it into the room.

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4. Step 4

   Voice of the customer

   Gemba interview protocol

   A question bank for interviewing someone while watching them do real work — built around what's observed in the moment, not recalled afterward, with reminders for staying out of the way of the work itself.

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5. Step 5

   Voice of the customer

   Win-loss interview guide

   A question bank for interviewing a buyer after a deal has closed, won or lost — built around the real decision factors and the competitive alternative, not a sanitized recap.

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6. Step 6

   Voice of the customer

   Affinity diagram

   A workshop-style synthesis of curated customer notes into themed clusters — the same clustering discipline as sticky notes on a wall, done in minutes with the tally and vital-few themes computed for you.

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7. Step 7

   Voice of the customer

   Critical-to-quality (CTQ) tree

   Translates a customer need into specific, measurable requirements — need, then the drivers that make it satisfied, then a concrete measurable target for each — with any need still missing a real specification named plainly.

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