Table 3.

The deployability indexes for various pipeline failure detection technologies.

Type of Defects	One Type	Multiple Types
	0	1
Building Materials of Pipelines	One Type	Multiple Types
	0	1
Substances Carried by Pipelines	One Type	Multiple Types
	0	1
Operating Environment	Underground or overground	Underground and overground
	0	1
Diameter of Pipelines	Fixed	Variable	No constraints
	0	1	2
Software Parameters	Exhaustive	Minimal tuning or none required
	0	1
Hardware Duplication	Difficult to duplicate	Can be duplicated with minimal or no changes required
	0	1
Hardware Portability	Non-installable	Temporary installation	Permanent installation
	0	1	2