Product Mix Decisions – Width, Length, Depth and Consistency

Published: June 01, 2015

When you’re starting a new business, it’s easy to get excited about launching new products.

You get one win? Hell yeah, let’s add more, why not?

But suddenly… you’re juggling six offers, none of them aligned, and your brand pretty much feels like a buffet.

That’s where product mix decisions come in — you have to figure out:

  • How many product lines you should actually have?
  • How deep each one should go?
  • Does it all fit together under one clear strategy?

In this article, we’ll break down the key concepts behind product mix decisions – and how to use them to scale your offerings without losing focus.

The Product Mix

First, we need to understand what the product mix actually is.

The product mix, also called product portfolio, is the set of all product lines and items that a company offers for sale.

For instance, the product mix of Colgate consists of three product lines: oral care, personal care and pet nutrition. Each of these product lines, in turn, consists of several sub-lines. A vehicle manufacturer may have two product lines: motorbikes and cars.

Product mix decisions need to be taken for the whole product mix and affect each line.

Diagram of product mix decisions showing the depth and width of product lines and types, including a specific example with product lines and product type variations
Organizational chart illustrating product mix width and line length with examples of different product types and categories.

4 Dimensions of the Product Mix – 4 Product Mix Decisions

Four important dimensions of a product mix can be identified. These are: width, length, depth, and consistency.

The first one refers to the product mix width.

The width is all about the number of different product lines the company carries. As mentioned in the previous example, Colgate has 3 product lines. Thus, it has a rather limited width.

The product mix length refers to the total number of items a company carries within the product lines.

For instance, Colgate carries several different brands within each line. In Colgate’s oral care product line, several different categories of toothpastes can be identified. A car manufacturer may have several series in its car product line, such as 3-series, 5-series, and 7-series.

The next product mix decision is the product mix depth.

It refers to the number of versions offered for each product in the product line. For instance, Colgate toothpastes come in several tastes and variations. The vehicle manufacturer’s 3-series in the car product line may be offered in several versions: convertible, coupé, sedan, and so further.

Finally, the consistency of a product mix completes our four product mix decisions.

Consistency refers to how closely related the product lines are in terms of end use, production requirements, distribution channels or any other way.

In Colgate’s case, we can observe a rather strong consistency, which is based on the fact that all product lines constitute consumer products and go through the same distribution channels. The vehicle manufacturer also has a relatively consistent product mix, since both product lines contain consumer-vehicles, can be sold in the same way etc.

Of course, these four decisions are interrelated and always have to be seen in conjunction with each other.

4 Ways to Increase Business with Product Mix Decisions

There are four ways in which a company can increase its business on basis of the four product mix decisions identified above.

  1. Add new product lines: widen the product mix. New lines benefit from and build on the company’s reputation in its other lines.
  2. Lengthen the existing product lines. More items in the product lines may result in a more full-line company.
  3. Add more versions of each product: Deepen the product mix.
  4. Make product lines more consistent (or less). This depends on whether the company wants to have a strong reputation in a single field or in several fields of business.

Regardless of the specific product mix decision taken, the realization typically includes the development of new products or product versions. This is called the New Product Development process (NPD).

Closing Thoughts

As you can see, the four product mix decisions are more than a strategic issue that has some impact on the company’s success.

To be precise, the product mix is one of the most critical instruments the company has. It is the center of its offerings.

Therefore, the right decisions should be taken in line with customer needs. Since customer needs may change rapidly, product mix decisions need to be taken more than once at the beginning – they are part of an ongoing process.

Only if product mix decisions are taken on an ongoing basis, maximum value for customers can be created.

Igor Levi

Founder

Product leader, entrepreneur, and data-driven strategist with a passion for AI, automation, and growth. With over 20 years in tech, he has built and scaled multiple B2B SaaS products, CRMs, ERPs, and Ad Tech platforms—leading teams through rapid growth, crises, and successful exits. He has held leadership roles at Billups, Outchart, and TUNE, navigating the fine balance between strategy, execution, and speed. Igor believes great products start with deep customer insight, clear decision-making, and smart automation.

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