Core Competence -What makes an ability (or set of abilities) a Core Competency

Different companies may have different core competency, one may have one of its main core competencies the product design and distribution channel for the other one the product uniqueness. For example for Honda the core competence is the high revving, light-weighting small engine they were able to create, which offered multiple benefits to the consumers.
For Casio some of core competencies that lead company to success and stand on a higher level against their competitors are display systems, which helped the company to move towards successes and they made outstanding products like calculator, laptop monitor and car dashboard. This has put Casio in a strong position in the market and brought more customer satisfaction.