Definition 1 : the ongoing improvement of processes that lead to achievement of higher levels of performance
Through incremental change.
Source: Glossary of terms, My first step with the EFQM Model 2010
Definition 2: Continual improvement is an approach that enables operators and managers to understand the operation of ongoing processes, learn from the data and outcomes, and think about process changes. It must include the capability of testing and validating proposed changes and incorporating the improvements in the standard operating procedures. It also demands good two-way communications with others in similar processes, in order that learning can be shared and to ensure that people do not have to rediscover the same solutions.
Source: Knowledge Hub, Chartered Quality Institute