productivity vs daylight or shift work

[d-decherd]

I need to bid a project where we start work before dawn, using lights. Work thru the day and into the night, again under the lights. Is there a productivity chart to use that covers differential shift work or working outdoors under lights?
RS Means did not cover this topic.

Suggestions of where to look for this information?

 

[rrrusty]

Re: productivity vs daylight or shift work

The NECA has a labor units manual that can be used for estimating jobs; It would seem to me that at night it would cut your productivity down from normal to difficult but not quite very difficult;Good luck