Sorry for the delay in receiving a response! Do you still need assistance with this? If so, can you post a sample workbook (twbx file)? Depending on how the data is set up will determine how this is done.
What is "-ve" and "+ve"? Positive and negative Volumetric Efficiency?
Hi Srinivas, Interesting to how you have settled on the solution part, if you could.
pl. post your experience.
I too need a similar answer especially, the variance is not a calculated field in Tableau but deriving from the data (pre-calculated). A condition based color coding. If you could link up to some threads or give your thoughts on my request http://community.tableau.com/thread/135013 it would be great.
Thanks and regards,