An assessment of U.S. manufacturing commotion rose to a near 13-1/2-year high as disturbance to the supply chains engendered by Hurricane Harvey and Irma affected the factories taking prolonged time to deliver goods and augmented raw material prices.

However, particulars of the Institute for Supply Management’s (ISM) survey stressed the economy’s concealed impetus with factories describing stronger order growth last month. A measure of factory employment hit its peak since 2011.

John Ryding, chief economist at RDQ Economics in New York said that ample of the gain is undoubtedly related to the aftermath of the hurricanes. However, manufacturing growth is robust. ISM reiterated its inventory of national factory activity rose to a reading of 60.8 last month, the highest reading since May 2004, from 58.8 in August. A reading above 50 in the ISM index specifies extension in fabricating that accounts for about 12 percent of the U.S. economy.

The ISM said Harvey and Irma had generated supply chain and pricing concerns in the chemical products sector. There were issues about disorderly impression of the storms on the food, beverage and tobacco products industries.

Manufacturers of nonmetallic mineral products said that even though the storms were increasing sales, they were engendering crucial price increases on input raw material.

As an outcome of the ISM’s supplier conveyance sub-index rose 7.3 points to 64.4. An extension in suppliers’ delivery time is usually linked to increased action that is an affirmative benefaction to the ISM index.