"industry-based or product/service-based categorization schemes almost never constitute a reliable theory." #readingToday

When managers ask questions such as "Does this apply to my industry?" or "Does it apply to service businesses as well as product businesses?" they really are probing to understand the circumstances. In our studies, we have observed that industry-based or product/ service-based categorization schemes almost never constitute a useful foundation for reliable theory.

The Innovator's Solution, Clayton Christensen