October 2004

Special Report: Improving Process Control

Understand control benefits estimates

Here's how the five popular methods work

Martin, G., Emerson Process Management

Five methods for estimating control function benefits using before-control data were previously presented.1 Three of the methods are based on statistics, and shifting the average of a controlled variable distribution in the profitable direction. The fourth method is based on curvature of the profit function, and the benefit calculated is independent of the location of the average. The fifth method disregards the distribution and simply shifts the average to a point that has been achieved by a significant percentage of the before-control data. While reference 1 provided derivations, equations and examples, it never made clear by illustration the rationale for the shift in the average, d

Log in to view this article.

Not Yet A Subscriber? Here are Your Options.

1) Start a FREE TRIAL SUBSCRIPTION and gain access to all articles in the current issue of Hydrocarbon Processing magazine.

2) SUBSCRIBE to Hydrocarbon Processing magazine in print or digital format and gain ACCESS to the current issue as well as to 3 articles from the HP archives per month. $399 for an annual subscription*.

3) Start a FULL ACCESS PLAN SUBSCRIPTION and regain ACCESS to this article, the current issue, all past issues in the HP Archive, the HP Process Handbooks, HP Market Data, and more. $1,995 for an annual subscription.  For information about group rates or multi-year terms, contact J'Nette Davis-Nichols at Jnette.Davis-Nichols@GulfEnergyInfo.com or +1 713.520.4426*.

*Access will be granted the next business day.

Related Articles

From the Archive

Comments

Comments

{{ error }}
{{ comment.comment.Name }} • {{ comment.timeAgo }}
{{ comment.comment.Text }}