Sentence:  page 128: T<sub>F</sub> = <WSD>Face time</WSD> in minutes = 480 — lunch — travel in time — travel out time / page 131: Likewise, a critical I.E. analysis of travel time can show quickly whether or not there is any potential for increased <WSD>face time</WSD> from improved ... 
Meaning of the word marked with <WSD> tags:  Time spent in visual communication with another party (as opposed to communication over the phone, via e-mail, instant messaging, etc.).