Product Diversification Strategy: Related vs Unrelated Expanding Your Business Product Portfolio

Every successful company eventually hits a ceiling. A single product, no matter how popular, can only grow so far before market saturation, changing tastes, or seasonal slumps start to bite. This is the moment when smart businesses look beyond their flagship offering and ask a simple question: what else can we make and sell? The answer often lies in product diversification, one of the most powerful growth strategies in marketing. Understanding how it works, and the very different risk levels involved, is essential for anyone studying how modern businesses expand and survive.

What is product diversification? 🔗

Product diversification is the strategy of adding new products to a company’s existing product line or product mix. Instead of relying on one item or one category, a firm deliberately broadens what it offers so it can capture more of the market and protect itself against downturns.

The core idea is to expand operations into new products, markets, or both, in order to reduce risk and increase growth potential. Diversification can reap huge rewards, either by opening up entirely new revenue opportunities or by reducing a firm’s reliance on a single product. When one product struggles, others can keep the company afloat.

Indian companies have used this approach for decades. HMT, originally known for machine tools, moved into watches and later tractors. Godrej, which started with locks and soaps, today spans consumer goods, real estate, appliances, and agriculture. These firms diversified to meet changing consumer tastes and to avoid putting all their eggs in one basket.

Where diversification fits in growth strategy 🔗

To understand diversification properly, it helps to look at the Ansoff Matrix, a framework developed by H. Igor Ansoff and published in the Harvard Business Review in 1957. The matrix maps four growth strategies across two dimensions: products (existing or new) and markets (existing or new).

The four quadrants are market penetration (selling more existing products to existing customers), market development (taking existing products to new markets), product development (creating new products for existing customers), and diversification (new products for new markets). Diversification is considered the riskiest strategy because it requires both product and market development at the same time, venturing into territory where the company may have little prior experience.

Within this riskiest quadrant, diversification itself splits into two broad types: related and unrelated. The difference between them comes down to how closely the new products connect to what the company already does.

Related diversification explained 🔗

Related diversification occurs when the new products are similar or complementary to the existing ones. The new business and the old business share strategic assets or resources, such as technology, a brand name, or distribution channels.

A classic example is Hindustan Unilever adding different varieties of toilet soaps, or extending its range to include toothpastes. The company already understands how to manufacture, brand, and distribute personal care products to retailers and households across the country. Launching a new soap or a toothpaste uses the same factories, the same sales force, and the same shop shelves that already stock its other goods.

This is also called concentric diversification, where a company diversifies into a business activity related to its core operations, often within the same industry. The principal feature is that there is some commonality in markets, products, or technology.

Why related diversification is cost-effective 🔗

The biggest advantage of related diversification is that it lets a company share brand, marketing, public relations, and corporate knowledge between the old and new products. Because the firm already has a reputation, an established distribution network, and technical know-how, it does not need to build everything from scratch.

This creates what strategists call synergy: the combined operations are worth more together than they would be separately. A trusted brand name eases the introduction of a new product, because customers already associate the company with quality and reliability. For this reason, many companies prefer related diversification, since it offers the potential for cross-business synergies through shared value chains.

That said, related diversification is not risk-free. Sometimes the expected benefits do not materialise because the analysis underestimates the cost of softer issues like managing change, integrating different work cultures, and handling staff. The synergies look good on paper but prove harder to capture in practice.

Unrelated diversification explained 🔗

Unrelated diversification involves introducing products that are quite different from the current portfolio. Here, the new venture has no significant relationship to the existing lines of business. A consumer goods company moving into industrial chemicals is a textbook case: the customers, the technology, and the selling methods all change completely.

This is the classic conglomerate strategy, sometimes described as a “new product, new market” move. The company is not leveraging its existing strengths at all. Instead, the logic is purely financial: spreading investment across completely separate industries so that a slump in one sector does not sink the whole enterprise.

ITC offers one of the clearest Indian illustrations. The company began life in 1910 as the Imperial Tobacco Company, focused almost entirely on cigarettes. Over the decades it launched its hotel business in 1975 with ITC Maurya in New Delhi, then moved into paperboards, packaging, agribusiness, packaged foods, and information technology. Today it is a diversified multi-business conglomerate, deliberately reducing its dependence on tobacco. [Image: A pie chart titled “ITC Limited: A Diversified Conglomerate” showing segments labelled Cigarettes, FMCG (Foods & Personal Care), Hotels, Paperboards & Packaging, and Agri-Business.]

The higher risk of going unrelated 🔗

Unrelated diversification is widely regarded as the most risky of all growth strategies. It is based mainly on profit considerations rather than on shared products, markets, or technology. When a firm enters an industry it knows nothing about, it may lack the expertise, the supplier relationships, and the customer understanding needed to succeed.

Research has consistently found that unrelated diversification has underperformed related diversification in study after study. Managing several very different businesses at once adds cost and complexity, and stretching too far from the core can dilute the brand and confuse customers. The safety of “not putting all your eggs in one basket” has to be weighed against the danger of operating in markets where the company has no real advantage.

Key advantages of diversification 🔗

Despite the risks, diversification offers a wide range of benefits that explain why so many companies pursue it. The first and most obvious is increased overall profitability. By offering and producing different types of products, a firm can maximise its profit and search for new opportunities in the market.

A broader product range also helps attract new dealers and retailers. Distributors are more willing to stock and promote a supplier who offers a full basket of goods rather than a single item, which strengthens the company’s presence on the shelf.

Diversification is also a powerful way of spreading overhead costs. Fixed expenses like administration, factory upkeep, and management salaries can be shared across many products instead of being loaded onto one. This is linked to economies of scope, where producing related goods together lowers production costs because they share common production factors.

Smoothing out the seasons and the supply chain 🔗

Many businesses suffer from seasonal fluctuations, with sales peaking at certain times of year and falling flat at others. Diversification helps level these off. By offering products that sell in different seasons, a company can offset seasonal or cyclical downturns in one market with positive performance elsewhere, creating a steadier cash flow throughout the year.

There are supply-side gains too. A diversified firm can sometimes reduce raw material costs by buying common inputs in larger quantities and using by-products from one process as inputs for another. Buying in bulk and sharing materials across product lines drives down the per-unit cost.

Finally, diversification can help small firms overcome their weaknesses, particularly high unit costs. A small producer making just one item often cannot achieve the scale needed to bring costs down. By adding products that share machinery, staff, and distribution, the firm spreads its fixed costs over a larger volume and becomes more competitive.

The underlying logic: managing risk 🔗

Running through all of these benefits is one central theme. Diversification mitigates risk by spreading investments across different markets or products, so that the company is less vulnerable to a downturn in any single sector. When one product line underperforms, others can compensate, which is exactly why firms like HMT, Godrej, and ITC chose to broaden their portfolios rather than depend on a single source of revenue.

The key takeaway is that diversification is not a single decision but a spectrum. At one end sits related diversification, which is safer and builds on existing strengths. At the other end sits unrelated diversification, which offers greater protection against industry-wide shocks but demands fresh capabilities the company may not possess. Choosing wisely between them is one of the most important strategic decisions a growing business will ever make.

What do you think? If you were advising a successful single-product company in India, would you push them toward related diversification to play it safe, or argue that unrelated diversification offers better long-term protection? And can you think of an Indian brand whose diversification you believe went too far?

References

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