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Supply Chain Management PMI Survey

The survey encompasses purchasing managers in the West Michigan area representing the region's major industrial manufacturers, distributors, and industrial service organizations.

Patterned after a nationwide survey conducted by the Institute for Supply Management, the strength of the survey is its simplicity. Each month, the respondents are asked to rate ten factors as "same" or stable, "up" or improving/rising, or "down" as in declining/falling. A summary of the survey findings, called the Business Survey Report, is issued each month.

View Full PMI Survey Archive

PMI Survey Factors

Interpreting the Data

For each of these ten elements, the responses are tabulated and converted to percentages. A diffusion index is then calculated by subtracting the percentage of "down" responses from the number of "up" responses.

If the number of ups exceeds the number of downs, then the resulting index number will be positive. Whereas it is certainly good news when the indexes such as new orders, production, and employment are positive and therefore rising, it is conversely bad news when lead times and prices are rising.

The survey also contains several standard open-ended questions.

  • First, the respondents are asked to list commodities that are in short supply.
  • The second question calls for the respondent to list any commodities or services that are rising in price. These two lists may be similar but are usually not identical. During periods of significant industrial inflation, both of these lists may grow very long.
  • A third question asks for a list of all major commodities and services that are falling in price.
  • Last but not least is a space for open-ended comments, allowing the survey participant to describe the marketplace as they see it. To keep the comments candid, the respondents themselves and their firms are not identified.
Page last modified September 22, 2026