The writer submitting work for critique places his intellectual child in the hands of an appraiser. It is often used by writers to obtain an evaluation before the manuscript is submitted to an agent or acquisitions editor.
Publishers purchase the rights to use manuscripts that show profit potential.
Acquisitions editors have guidelines determining the type of material in which the publisher wishes to make an financial investment. The editor will use critiquing skills in making their assessment of work offered them by writers. They select manuscripts needing the fewest corrections and changes, thereby lowering the cost to the publisher. The only way to be guaranteed never having an agent or acquisitions editor reject a manuscript is to never submit work for publication. One of the ways to receive an honest, constructive evaluation of the market potential of your writing is to have it critiqued by other writers and editors.