Affordability - Based on maintenance costs, warranty/extended service agreement, replacement parts, complete package and training costs.

Capability - Based on cutting and chipping a variety of materials, durability, versatility, bit selection, air consumption rate, multiple air sources, environmental requirements and sealed against dust/ debris.

Deployability - Based on portability, ease of assembly.

Maintainability - Based on field/user serviceability, in-service maintenance, cleaning, parts/service availability, scheduled maintenance and maintenance tool requirements

Usability - Based on simple to operate, easy to control, easy-to-change bits, user-friendly air connection, ergonomics/balance, moise level/direction, user fatigue and multi-directional use.