This manual describes the use and maintenance of the Personnel Inventory Aging and Promotion (PIAP) model and discusses its development, structure, and outputs. Additionally, the manual provides guidance for interpreting the model’s results. The PIAP model can be used to examine the effect of various manpower policy implementations and their future consequences to the Navy’s personnel profile. The user may analyze how policy changes will affect promotion tempo, promotion rates, likelihood of promotion, time in service, time in grade, separation rates, and future gaps between requirements and personnel. The PIAP model resides in an Access database and includes an Excel workbook that compiles, processes, and formats the data for analysis.
In order to investigate which duty stations and ratings are at a high risk for hearing loss, this study looked at the Defense Occupational and Environmental Health Readiness System (DOEHRS) medical hearing test records of nearly 251,000 enlisted sailors and officers over the twenty-five year period 1979 to 2004. The study found that enlisted sailors who spend most of a 24 year Navy career assigned to a Naval Surface Warship1 as opposed to being assigned to ashore duty stations or a Naval Support ship, had a much higher probability of leaving the Service with a reduction in their ability to hear. Since many individuals lose some hearing as they age, the study controlled for aging along with other factors such as gender and race to properly test if there are differences associated with ship assignments. To accomplish this task, we merged Navy medical records of hearing tests with information on each individual sailor's duty stations.