Appraising while arranging is probably such a natural process that most never consider it appraisal. Yet, retention appraisal and arrangement work hand in hand during the progressive refinement of control over an accession. Each successive level of control more specifically identifies the records present. This changes the context for the appraisal and progressively narrows the focus of the retention decisions. Rather than a single step, weeding occurs bit by bit, depending on the information made available through arrangement.