According to Robert Keith's $1960$ article "The Marketing Revolution," the following four eras correspond to their corresponding examples from his experiences at Pillsbury except:

The second sales oriented era saw a greater awareness of the wants of the consumer but not much attention paid to dealers and their chains of distribution.

The fourth marketing control era will see Pillsbury shift more of its operations, finance, capital planning, and managerial functions under the wider umbrella of marketing

The first production oriented era saw the availability of quality wheat and the proximity of water power as driving Charles Pillsbury's concerns to focus on production and not yet marketing.

The third marketing oriented era saw Pillsbury, with the creation of hundreds of new products, begin to set criteria for the selection of products they would manufacture.