Annual maintenance is an important measure in ship maintenance reform and is crucial for enhancing ship operational availability and maintaining technical conditions. Currently, the schedule control of annual maintenance projects still relies on traditional management models, which often result in lengthy maintenance cycles. To improve the traditional methods, this paper introduces coefficients for uncertain factors, process location, time elasticity, and resource utilization, based on the Critical Chain Technology (CCT) theory. A calculation method for the project buffer is established, and a schedule control model for annual maintenance projects based on CCT is constructed. The applicability of the model is verified through a case study of an annual maintenance project. The results show that the application of Critical Chain Technology effectively enhances project management, control, and execution capabilities, while significantly shortening the annual maintenance cycle.

The traditional functional organizational structure of the ship repair plant cannot meet the needs of modern production in the process of support with the increasing complexity of ship equipment. In view of the above problems, different management organizational structures are analyzed and compared to propose a hybrid organizational structure based on strong matrix organizational structure, which effectively improves the horizontal communication efficiency between cross departments. At the same time, a compensation model of “salary + incentive + reward” is proposed, which increases the enthusiasm of employees. Finally, the application of the hybrid organizational structure in modern shipyards in the first level repair process of a ship in a shipyard are analyzed through a survey questionnaire. It can provide ideas for the organization and management of modern shipyards.