ISM® has discovered an error in its software programming for calculating the May 2014 Manufacturing PMI® that was released at 10 a.m. ET this morning.

“We apologize for this error. We have recalculated and confirmed that the actual index indicates that the economy is accelerating,” said Bradley J. Holcomb, CPSM, CPSD, chair of the Institute for Supply Management® (ISM®) Manufacturing Business Survey Committee. “Our research team is analyzing our internal processes to ensure that this doesn’t happen again,” he added.

“The May PMI® registered 55.4 percent, an increase of 0.5 percentage point from April’s reading of 54.9 percent, indicating expansion in manufacturing for the 12th consecutive month. The New Orders Index registered 56.9 percent, an increase of 1.8 percentage points from the 55.1 percent reading in April, indicating growth in new orders for the 12th consecutive month. The Production Index registered 61.0 percent, 5.3 percentage points above the April reading of 55.7 percent. Employment grew for the 11th consecutive month, registering 52.8 percent, a decrease of 1.9 percentage points below April’s reading of 54.7 percent. The Supplier Deliveries Index registered 53.2 percent, 2.7 percentage points below the April reading of 55.9 percent. Comments from the panel reflect generally steady growth, but note some areas of concern regarding raw materials pricing and supply tightness and shortages.”

The Manufacturing Report on Business®can be traced back to the start of the survey in 1923 and since then it has become a reliable planning tool for businesses and governments. “We are committed to maintaining the integrity of this report,” Holcomb said. The error resulted when the software incorrectly used the seasonal adjustment factor from the previous month.

Original Manufacturing ISM Release

U.S. manufacturing activity slowed last month and construction spending rose less than expected in April, which could temper hopes of a sharp pick-up in economic growth this quarter.

The Institute for Supply Management (ISM) on Monday said its index of national factory activity fell to 53.2 in May from April’s reading of 54.9. A reading above 50 indicates expansion.

The slowdown reflected some cooling in new order growth, production and hiring.

“It looks softer across the board. All the components grew at a slower pace. I don’t think this signifies a big concern but manufacturing won’t be leading the economy,” said Gus Faucher, senior economist at PNC Financial Services in Pittsburgh.

In a separate report, the Commerce Department said construction spending increased 0.2 percent to an annual rate of $953.5 billion, the highest level since March 2009.

The increase was less than economists’ expectations for a 0.6 percent gain. March’s construction spending was revised to show a 0.6 percent rise instead of the previously reported 0.2 percent advance.

Coming on the heels of weak consumer spending data for April, the reports could cast doubts on the economy’s ability to reach a 4 percent growth pace in the second quarter as some economists anticipate.

The economy shrank at a 1.0 percent rate in the first quarter, largely reflecting a brutally cold winter and a slow pace of restocking by businesses.

Prices for U.S. Treasury debt rose on the data, while the dollar fell from a three-week high against the yen.

Spending in April was led by public construction outlays, which rose 0.8 percent. Spending on both federal government and state and local government projects increased solidly.

But spending on private construction projects was flat as a 0.1 percent rise on residential outlays was offset by a 0.1 percent dip in nonresidential projects.

Still, private residential construction spending hit its highest level since March 2008. There were increases in both single and multi-family home building, a hopeful sign for housing, which is struggling to find momentum.

A run-up in mortgage rates has stymied the housing market recovery. Investment in home building and nonresidential structures such as factories and gas pipelines contracted in the first three months of this year for a second straight quarter.