viability

See the following -

Treasure Data's Hiro Yoshikawa: Taking The Open Road With Big Data

Jack M. Germain | Linux Insider | September 10, 2013

"There are four V's of Big Data that are often talked about: velocity, volume, variety and value. There is a fifth V that is often missing in many Big Data projects: viability. A lot of Big Data projects fail because they require too much upfront investment and maintenance. [...]." Read More »