A virtual production line indicating an object sequence for an actual production line and objects planned in the future is updated based on a long-term production plan, a fixed production plan, and actual production results. A plug holder can be held at a partial locking position on the housing where it is spaced back from the rubber plug and can be moved to a full locking position where it is located immediately behind the rubber plug. If the response satisfies the one or more desired performance characteristics, control of at least one component of the HCCI engine-based power system may be enabled based on the one or more control parameter values. , spatial frequency or orientation sweeps.