Reliability through 'Passport' Fundamental to our reliability program is a design process known as 'Passport'. An initiative unique to Otis, the Passport process establishes strict checkpoints from planning and development through to manufacture and delivery to site. Specifically, it means the product has to be approved at each checkpoint before it can proceed to the next stage. And, importantly, it involves staff at all levels including Otis Senior Management. Main components are tested and proven to ensure an average life expectancy in excess of 20 years.