Maximum Likelihood Method of Maintainability Growth Evaluation for Weapon Equipment

The evaluation of maintainability growth plays an important role in improving materiel system effectiveness. Based on field maintenance information, a maximum likelihood model is put forward to evaluate the maintainability growth at the system level and sub-system level. A maximum likelihood function can be built after all the maintenance data can be divided into the following three categories: incomplete repair time data, complete repair time data, super-complete repair time data. According to the actual situation of the maintenance data, an appropriate approximation can be made and the approximate analytical solution can be obtained. The values of μ and σ can be obtained as the corresponding estimated value of unknown parameters. By effectively mining the latent sample information, the maintainability growth evaluation is logical and reasonable.