Microspeak: large or small - never indifferent...
delta
The distance, or period of time, between where a project is and where it should be. Derived from the mathematical term (as opposed to river mouth, Greek alphabet, or fraternity usages) describing "an incremental change in a variable." Used in reference to all manner of things - "testing delta," "production delta," or "stock delta;" defined as the difference between an employee's "strike price" (the lowest price of MS stock during the first 30 days of the blue badger's employment) and the current price, often a figure inspiring boisterous gloating.

© Ken Barnes

"Any activity which involves a degree of uncertainty is delta-driven." (Prof. E. A. Nasdaq, in 'The seven rabbits of really effective magicians')