Space launch vehicles based on solid rocket motors are more cost effective than liquid rocket engine boosters. When stringent performance and dimension (length and diameter) constraints can be relaxed, design and manufacturing margins can be increased. Designing and manufacturing quality into the product, increases solid rocket motor reliability and substantially reduces cost . Since propulsion is a major component of recurring launch cost, such improvements result in reliability and a lower launch service cost. Higher reliability has implications for insurance costs as well as weighing the merits of self insurance against buying insurance. The inherent simplicity of solid rocket motor based space launch vehicles reduces assembly, checkout, and launch cycle times thus also reducing costs.