Phase 1 included the development and qualification of the casting design and  the casting process definition to produce two prototype shoes that met the design requirements. 
Phase 1 started in May 2004 and concluded with a production decision in Aug 2004.  

Phases 2 and 3 specified the production of 1,044 shoes in two sets to outfit both Crawler Transporters within a sixteen week production schedule.  
Phases 2 and 3 began in Aug 2004 and had to be completed with final delivery in January 2005.