Design for Reliability of Complex System: Case Study of Horizontal Drilling Equipment with Limited Failure Data

Table 5

Initial reliability and target reliability for subsystems of drilling equipment with Weibull distribution.

Subsystem	Reliability importance; (2000 hours)	Initial reliability; (2000 hours)	Weighting factors	Target reliability; (2000 hours)
Frame
Cab
Engine
Hydraulic
Rod loader
Vise
Control and electrical
Water pump
The whole system	—		—