What is Product Mix and Product Line?
The product line is a group of products that are closely related (same function, same customer, same channel, same price range). The product mix is the entire set of all product lines and individual items the firm offers. Four dimensions describe the mix. Width — number of lines (Procter & Gamble has dozens). Length — total items across lines. Depth — variants per item (sizes, flavors, formulations). Consistency — closeness of lines in production and end-use (P&G's consistency in fast-moving consumer packaged goods is high; GE's historical mix had low consistency from jet engines to consumer appliances).
How Product Mix and Product Line actually works
The framework breaks down into the following moving parts. Knowing what each piece is — and what it is not — is what separates a B-grade answer from an A-grade answer in a written assignment.
- Width — number of product lines
- Length — total items across all lines
- Depth — variants per item
- Consistency — relatedness of lines
- Each dimension affects strategy, operations, marketing
A worked example: Apple
Apple's product mix is famously narrow but deep. Width: relatively few lines (Mac, iPhone, iPad, Watch, Wearables, Services) compared to Samsung's dozens. Length: each line has fewer SKUs than competitors. Depth: each SKU has multiple configurations (storage, color, connectivity). Consistency: high — all lines share design language, OS family, and ecosystem integration. The narrow-but-deep mix supports operational efficiency, brand consistency, and the ecosystem network effect — and Apple's gross margin (44%) reflects the strategic discipline.
Don't lose marks for these
- Adding lines without consistency to existing mix
- Treating depth as a substitute for width
- Confusing line extension with mix expansion
How to use this on the exam
Score-maximizing moves
- Define all four dimensions
- Apply to a multi-line firm
- Distinguish line from mix
When to use Product Mix and Product Line (and when not to)
Use Product Mix and Product Line when your assignment asks you to analyze, structure, or recommend — and when you have at least two data points to populate every cell of the framework. Skip it when the question is asking for a numerical answer or a single recommendation, since Product Mix and Product Line is a structuring tool, not a calculator.