Thanks Tom, for your reply.=20 I agree with you, this is a very good forum to exchange our ideas. Regards -----Mensaje original----- De: tom.vandewater@xxxxxxxxxxxxxx = [mailto:tom.vandewater@xxxxxxxxxxxxxx] Enviado el: Martes, 6 de Julio de 2004 12:48 Para: foxboro@xxxxxxxxxxxxx Asunto: Re: [foxboro] Control loops per operator Claudio, There is a lot of discussion as to whether or not using a loop count or # of controller count per operating technician is an effective way = of measuring technician utilization but I know it varies widely based on = the amount of control coordination and automation installed and it also = makes a big difference as to whether the processes are continuous like many distillation trains, or batch like many reactor systems. I have an = easy way to document how many analog controllers, (such as PID, DGAP, PTC), each = of our operators are controlling and it ranges from 148 to 246 per = operating technician in our plant. That doesn't include any of the discrete controllers used for discrete valves and motors but I have found that = our discrete functions are generally twice the number of the analog = controllers for our processes so you can do the math. I would be interested in = hearing comparisons from other plant operations throughout the world and this = is a great forum for it. Via automation over the years the number of board operating technicians required to run the plant has been reduced. This can allow = the freed up resources to focus more on improving the reliability of the = field equipment via increased preventive maintenance activities. Tom VandeWater Control Systems Developer/Analyst Dow Corning Corporation Carrollton, KY USA -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]On Behalf Of Perez, Claudio Sent: Monday, July 05, 2004 11:25 AM To: 'foxboro@xxxxxxxxxxxxx' Subject: [foxboro] Control loops per operator Gentlemen: Do somebody have some figures about the right number of operators per control loops (pid, hand controls, i/o, etc). Is there some =3D standard to follow? Till now I couldn't find good information. Thanks in advance. Claudio A. Perez Control Systems Eng. PROFERTIL S.A. (54) 291 459-8139 cperez@xxxxxxxxxxxxxxxx www.profertil.com.ar Esta informaci=F3n es privada y confidencial y est=E1 dirigida = =FAnicamente a su destinatario. Si usted no es el destinatario original de este mensaje = y por este medio ha tenido acceso a dicha informaci=F3n, por favor elimine el mensaje. La distribuci=F3n o copia de este mensaje est=E1 estrictamente prohibida. Esta comunicaci=F3n es s=F3lo para prop=F3sitos de = informaci=F3n y no debe ser considerada como propuesta, aceptaci=F3n ni como una = declaraci=F3n de voluntad oficial emanada de Profertil S.A. La transmisi=F3n de e-mails = no garantiza que el correo electr=F3nico sea seguro o libre de error. Por consiguiente, no manifestamos que esta informaci=F3n sea completa o = precisa. Toda informaci=F3n estar=E1 sujeta a alteraciones sin previo aviso.=20 This information is private and confidential and intended for the = recipient only. If you are not the intended recipient of this message you are = hereby notified that any review, dissemination, distribution or copying of = this message is strictly prohibited. This communication is for information purposes only and shall not be regarded neither as a proposal, = acceptance nor as a statement of will or official statement from Profertil S.A. = and/or subsidiaries and/or affiliates. Email transmission cannot be guaranteed = to be secure or error-free. Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such. All information is subject to change without notice. _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave