If a core competency yields a long term advantage to the company, it is said to be a sustainable competitive advantage.
For example, Black and Decker's core technological competency is in one-quarter to three-quarter horsepower electric motors. All of their products are modifications of this basic technology (with the exception of their work benches, flash lights, battery charging systems, toaster ovens, and coffee percolators).
They produce products for three markets;
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