When a product serves a narrow market, the usual textbook definitions of TAM, SAM and SOM can feel abstract. The exercise below shows how the three layers look for a salt‑handling rover aimed at Indian salt‑pan owners.
Total Addressable Market (TAM) – Every salt‑producing operation in India where salt is still moved by hand and where sudden rain can ruin a harvest. That includes the large coastal belts of Gujarat, Tamil Nadu, Andhra Pradesh, Odisha and West Bengal, plus many inland seasonal pans. The common thread is manual handling and weather exposure. Even the biggest producers in these regions still rely on labour for the final collection step, so the problem spans the whole sector.
Serviceable Addressable Market (SAM) – The subset we can realistically reach with our current resources and distribution plan. That narrows to the major salt‑producing districts of Tamil Nadu: Vedaranyam, Thoothukudi, Ramanathapuram and Kancheepuram. These areas have a high density of small and medium producers, good road access for a field team, and a local network of contractors who already coordinate harvest logistics. Because we are based in the same state, travel, language and regulatory familiarity are already solved. The SAM also matches the regions where we have already done on‑ground research.
Serviceable Obtainable Market (SOM) – The first group we can actually sign up. In practice that means salt‑pan owners, contractors and producer groups in Vedaranyam who have expressed willingness to join a pilot trial or a seasonal rental programme. They are the people we have already spoken to, who understand the problem, and who can give us immediate feedback on a prototype. The SOM is deliberately tiny — a handful of farms — because the goal is to prove value before any scaling effort. We treat each pilot participant as a reference customer for the next district.
The strategy is simple: prove value with this small Vedaranyam group, collect data on labour savings and loss reduction, then expand step by step to the neighbouring clusters in Thoothukudi and Ramanathapuram, and eventually to the wider Tamil Nadu coast. No market‑size numbers are required to make the logic clear — each layer is defined by geography, access and willingness to try. The same framework can be reused for any future product that targets a geographically clustered user base, making it a repeatable planning tool for similar hardware ventures and service teams.