booktobill
Book-to-bill is a metric used in the semiconductor equipment industry to assess demand relative to supply. It compares new orders received to shipments billed in a given period, typically monthly. The ratio is usually expressed as a single number: book-to-bill = orders received divided by shipments billed.
A ratio above 1 indicates demand outpaces shipments, suggesting backlog growth and potential expansion in production
Data for book-to-bill are commonly compiled by industry groups such as SEMI, which publishes a monthly Book-to-Bill
Limitations of the metric include its sensitivity to order cancellations, large one-time orders, and shipments scheduled