A professional who examines loom parts, warp and filling thread, and cloth being woven to ensure that loom is set up to weave specified pattern. Responsibilities include:

• Inspects pattern chains, order in which warp threads are drawn through harness assembly, and color of warp and filling thread to detect errors in loom setup.
• Makes adjustments such as changing pattern chains and redrawing warp threads.
• Starts loom and examines cloth being woven to detect defects.
• Determines cause of defective weaving and makes adjustments or notifies loom fixer.
• Notifies weaver to continue operation of loom after adjustment.