How to Make a CTQ Tree: Six Sigma Critical to Quality

CTQ means Critical to Quality and CTQs are parameters that formulate in business words, the requirements of the consumers. CTQs are very valuable while improving a product and service.

In Six Sigma and other continuous modification projects too, CTQ plays an important role as the main objective of many of these projects is to provide a product and service that fulfills the consumers on various parameters.

CTQ tree is a method used to identify and list out all the customer requirements into measurable functional parameters.

Critical to quality trees are utilized internally to help your company identify what your customers truly want so you can establish processes to meet those demands and these visuals are a strategic part of formulating a high-quality product that can continuously develop and withstand an ever-changing market.

Here, you’ll find steps of developing a CTQ tree so you can explain the needs of your consumers into actionable tasks for your organization.

Proceed to our step-by-step tutorial to learn more about observing critical needs and drivers.

When to use CTQ tree

CTQ trees are continually used as part of the Six Sigma method. If you’ve enforced DMAIC procedure, CTQ trees fall under the “define” phase and you don’t necessarily need to enforce Six Sigma to benefit from a CTQ tree.

If you’re managing the CTQ tree on its own, not as part of a vaster procedure, you’ll still come away with actionable descriptions for delivering a nicer and better product. You should establish a critical quality tree after you gather the Voice of the Customer and start to identify consumer needs. It’s useful to build a CTQ tree are:

  • When you wish to formulate a better product
  • Early launching a product
  • Early launching a project
  • To better realize your customer’s needs and wants
  • To help your product and service be more competitive in the market
  • To identify and decide issues with a current product and service

How to Use CTQ

CTQ Tree takes the structure of a simple diagram that helps project companies identify, list, and zero-in on what is most valuable to the customer. The CTQ tree contains three factors.

**Need –**This is the beginning point for comprehending how to delight the client. Needs are what your product and service must provide to customers to make them happy. If you own a pizzeria, your buyer’s need is pizza.

Driver – These are the components that your customers will use to judge how well your product and service fulfills their needs. In the pizzeria example, drivers include the quality of the pizza, the speed with which it is ready, and the variety of usable topping choices. Observing drivers gives project teams another level of comprehension about how to satisfy their consumers.

Requirement – These are measurable achievement standards that drivers must meet to satisfy the customer. Requirements help project teams measure the quality and achievement of the product or service. In terms of pizza, requirements measure how well the drivers meet consumer needs. Quality is a driver that is calculated by the appearance, temperature, and taste of the pizza. Speed is calculated by how quickly the pizza gives to the table and variety is measured simply by the number of usable toppings and varieties.

CTQ Tree Fundamentals

Comprehending the fundamentals of the CTQ tree helps companies use it effectively. Coalitions can create a CTQ tree by following three steps:

List important needs – What are the important needs that your product must meet? Generally, the best way to assume customer needs is to ask customers directly. If this is not an option, consumer support staff can provide important insight and the team can brainstorm.

Determine drivers – Look at the procedure in terms of what’s greatly important to consumers and identify how to meet their desires. Confirm these drivers with buyer support and sales staff and with the consumer directly.

Identify accomplishment requirements – Once the team has recognized drivers, the next step is breaking them down into measure performance requirements. Here, the company takes inventory of the technology and help to ensure that it can meet customer needs.

What do your customers consider important in your product and service? Developing an effective CTQ tree can help your team comprehend what the consumer truly desires and help you ensure that they get it.


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