We’ve always taken a 1 FB / job, per day approach with a FB being conducted at Stage 3 if it’s happening that day. I’ve always thought of the FB regime to be a bit of a fudge as you could argue that every test needs a field blank attached to it, as conditions could be different for each test you do! Calling it a blank is a bit misleading too, as you are opening the cowl for a brief moment so it has some exposure – maybe more a ‘control’ than a blank!
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