Productivity Improvement by Best Practice Pilot

Descargas (788 KB)

Michio Hoshikawa1 Hiroaki Sugita1 Kikuharu Arai2 Takashi Inoue3

Recently, standardization of procedural automation of manual operations has been promoted mainly by the International Society of Automation (ISA). As a leader in this area, Yokogawa released the operation efficiency improvement package, Exapilot, which integrates the expertise of skilled operators into automatic sequences and operational guidance for the first time in the world. Yokogawa has since gained much experience of many applications in various industries. To utilize Exapilot know-how to help customers operate their plants effectively, Yokogawa has launched a new service called "Best Practice Pilot." By applying it to a continuous polymerization process in the Ehime plant of NIPPON A&L INC., the project dramatically shortened the start-up time and reduced manual operations. This report outlines the Best Practice Pilot and its application to the polymerization process.

  1. Production Department, EHIME PLANT, NIPPON A&L INC.
  2. Vigilant Plant Services Center, Industrial Automation Business Headquarters
  3. Start-Up Department, Solution Engineering Center, Global Engineering Business Headquarters


Recently, standardization of procedural automation of manual operations has been promoted mainly by the International Society of Automation (ISA), and the functional requirements necessary for automation are being studied by the ISA106 committee in the US.

As a leader in this area, Yokogawa released the Exapilot operation efficiency improvement package1, the procedural automation software in 2000, which integrates operational know-how into explicit knowledge and automatic sequences, for the first time in the world. Yokogawa has since provided more than 1,000 Exapilot systems around the world. The Best Practice Pilot is a service that offers customers a solution for the best plant operation by implementing the expertise of skilled operators into Exapilot procedures by utilizing know- how accumulated through the Exapilot applications.

This report introduces how Exapilot was utilized for operational improvement in the EHIME PLANT of NIPPON A&L INC.


The EHIME PLANT of NIPPON A&L INC. (hereinafter referred to as "Ehime plant") produces various types of plastic products. Especially, the polymer known as LITAC-A is much appreciated in the market because of its transparency, dimensional stability, and mechanical strength.

Some of the features of the continuous polymerization process to which this service was applied and its operations to be automated and standardized are described below.

  • The start-up operation of the polymerization reactor, which is the main facility in the process, requires strict temperature control.
  • Other relevant facilities must be started up simultaneously with the reactor.

These troublesome and delicate start-up operations placed a heavy burden on operators.


A few years ago, the Ehime plant consolidated several control rooms and migrated a distributed control system (DCS) from the old one to the CENTUM CS 3000. The consolidation was successfully finished but many operations continued to be done manually to replicate the operations equivalent to those before the consolidation. As a result, operational improvements to achieve the expected effects of the consolidation remained as future issues.

Around that time, Yokogawa was about to launch this service as one of its solution businesses, and the Ehime plant and Yokogawa shared various expectations. Consequently, we jointly studied the feasibility of applying this service as described below.

  1. Provisionally analyzed the operation data in January 2010.
  2. Confirmed through the analysis that there were too many manual operations compared with the number of operators, and that it was necessary to reduce the burden on the operators.
  3. Examined the feasibility of procedural automation by applying Exapilot to decrease the number of manual operations and to achieve more economical operation.
  4. Exapilot had been installed in the Ehime plant as the system was migrated to the CS 3000. Exapilot is highly compatible with the CS 3000, and so the combination of Exapilot and the CS 3000 was expected to be useful for improving operations. However, the usage of Exapilot functions was limited to the logic monitoring, not for automating procedures.
  5. Decided to introduce Yokogawa's Best Practice Pilot for relieving anxiety about utilizing Exapilot for control purposes and for configuring and installing an application smoothly.


Figure 1 Configuration screen of Exapilot
Figure 1 Configuration screen of Exapilot

An overview of the Best Practice Pilot and the Exapilot utilized for this service is described below.

Contents of the Service

In an unsteady state, and even in a steady state, many operations are left to the operators' discretion, posing an obstacle to the improvement of operation efficiency. The Best Practice Pilot offers consultation for procedural automation of manual operations and operation procedure standardization and implements the optimized procedures into Exapilot including its engineering service. The Best Practice Pilot includes the following.

  1. Engineering
    • Development of Exapilot applications and relevant templates
    • Service report
  2. Consulting
    • Holding of a meeting of a Cross Functional Team (CFT) consisting of engineers from the customer's various organizations and from Yokogawa
    • Provision of improvement experience
    • Promotion of OJT
    • Observation of the test operation of the configured application

Exapilot Operation Efficiency Improvement Package

Figure 2 Execution monitoring screen of Exapilot
Figure 2 Execution monitoring screen of Exapilot

The procedural automation of manual operations requires a lot of system resources and engineering man-hours if done using only DCS functions. Even after the completion, it entails considerable costs for maintenance in response to process changes, such as modification of equipment.

Exapilot provides icons on the configuration screen representing operational functions, such as starting pumps, FCS data setting, requesting field work, and holding a process until a predefined period of time has elapsed or a specific condition has been reached. By placing and linking these icons in a sequence of operation procedures on the screen, experienced operators can program their own expertise and procedures into Exapilot as semi-automatic operation sequences. The FCS data setting means downloading the settings of the data or mode of operation into the field control station (FCS). Figure 1 shows an example of the configuration screen of Exapilot.

As shown in Figure 2, execution of the programmed sequence is displayed on the operator console, which can be used for phase progress management.

Typical System Configuration

Figure 3 shows a typical system configuration for the automation of operation using Exapilot. Exaopc2 in this figure is OLE for Process Control (OPC) interface-compatible general-purpose OPC server software.

Figure 3 Example of connection with the CENTUM VP/CS 3000 system

Figure 3 Example of connection with the CENTUM VP/CS 3000 system

Service Procedure

For maintaining a certain service quality, each step of the procedure of this service is defined on the basis of the Six Sigma DMAIC (Define, Measure, Analyze, Improve, and Control), which is a famous quality control method for products. Table 1 shows the procedure.

Table 1 Procedure for the Best Practice Pilot

Step 1: Define
  • Select target operation
  • Decide purpose of standardization and automation
  • Set quantitative target (as needed)
  • Establish a cross-organizational task force
Step 2: Measure
  • Learn best practices from skilled operators
  • Acquire necessary information such as SOP
Step 3: Analyze
  • With team members of the task force, assess, standardize operation procedures, and enter them into Exapilot
  • Design and build stylized operations as template logics in Exapilot
  • Consider automation of operations of relevant field instruments
  • Design DCS control functions so that the application functions are smoothly allocated to Exapilot and the DCS.
Step 4: Improve
  • Modify DCS application (where possible)
  • Automate operations of relevant field instruments (where possible)
  • Incorporate best practices into Exapilot
  • Debug Exapilot application offline, and apply it to actual plant operation
Step 5: Control
  • Evaluate improvement effect
  • Report on results of service


The application of this service in the Ehime plant is outli ned below.


The target operation was determined through discussion between the Ehime plant and Yokogawa. In the meeting, Yokogawa introduced examples of Exapilot applications and explained key success factors as know-how. Since this was the first trial of introducing an operational improvement service for the Ehime plant, the start-up operation of the continuous polymerization process was selected as the target of the service, since the procedure is sufficiently complex to expect certain benefits with limited risk of the work load for application configuration. The operation offering the maximum return was not selected because of its higher risk of considerable man-hours.

The improvement goals were to standardize the start-up operation, minimize the time required for the operation, and minimize manual operations (to almost zero, if possible).


Before starting the actual works, training of "operational improvement using Exapilot" was conducted at the Ehime plant to get the customer familiar with the service procedure. Since the targets were already set, the training was carried out effectively. A part of the operation procedures was temporarily input to Exapilot as a product of this training.

To establish the best operation procedure and to standardize it, the contents of the Standard Operation Procedure (SOP) for the targeted operation were assembled and modified to meet the actual best practice at the same time.

Through the training, people at the Ehime plant learned how to break down operation procedures into Exapilot and also learned how to construct logic using Exapilot.


The Ehime plant took the initiative in configuring the application. The configuration work included the following items.

  • Inspection of the operation procedure to be input into Exapilot
  • Study of allocation of functions between Exapilot and DCS
  • Construction of operational sequences using Exapilot

This configuration work was finished in a total of approximately 10 working days over three months.


  1. Checking the application contents
    Yokogawa checked the contents of the application created by the Ehime plant for the following items.
    • Logical error check
    • Consistency between the received SOP and the contents of the application configured using Exapilot
    • Functionality assessment for on-line execution
    • Cooperation with DCS
    • Visibility (Visibility is an important factor since Exapilot applications are viewed on a Human Machine Interface (HMI) for phase progress management.)
  2. Proposal for improving the application
    Yokogawa presented the points to be corrected, such as typing errors in the tag names of the storage devices, and proposals for reconsideration to the Ehime plant as a summary of reviews.
  3. Confirmation of improvements to the application
    The Ehime plant finally checked the application based on the proposals offered by Yokogawa.
  4. The completed application was applied to the start-up operation in the presence of Yokogawa.


The improvement effect brought about by the service was evaluated and reported with the service activities of the application.


  1. A large screen was prepared and the Exapilot execution monitoring screen was displayed on it to utilize the progress management function of Exapilot effectively. As a result, everyone involved with the operation could easily monitor the progress at a glance.
  2. By optimizing the operation procedure, a 10- to 11-hour start-up operation was shortened by 1 to 2 hours.
  3. The number of manual operations in DCS was drastically reduced.
  4. The work was successfully completed without any fatal initial failures, which are common when new applications are introduced.


  1. Although most of the work of this application was carried out by the Ehime plant, Yokogawa contributed a lot throughout the process by offering Exapilot know-how, especially during the steps of Define and Improve. As a result, the roadmap of the application was clarified, the necessary works were minimized, and the troubles of inconsistent logic, which are common on initial introduction, were avoided.
  2. The initial anxiety about automating sensitive manual operation to control reactor temperature precisely has been eased by the successful introduction of the Exapilot application. Consequently, the effectiveness of Exapilot for other applications is widely recognized.
  3. In this case, a key success factor is that Yokogawa had a clear vision of the control system in the Ehime plant, and was able to offer the right services at the right timing. This experience emphasizes the importance of daily communication between users and vendors.


Based on the successful experience of Exapilot application, the Ehime plant is now considering expanding procedural automation to more complex operations as well as to other processes in the plant.

Yokogawa has conducted consulting services utilizing Exapilot tailored to each user's individual requests. Reviewing this case as the start of the service, Yokogawa will establish Best Practice for the service. This includes improving and enhancing the contents of the service, so that the service can be offered in a systematized way.


  1. Yasunori Kobayashi, "Exapilot, Assistant Package for Improvement of Operational Efficiency," Yokogawa Technical Report, Vol. 43, No. 3, 1999, pp. 17-20 in Japanese
  2. Nobuhiko Terashima, Shinji Okayasu, "Exaopc OPC Interface Package," Yokogawa Technical Report, Vol. 43, No. 3, 1999, pp. 13-16 in Japanese
  • LITAC-A is a registered trademark of NIPPON A&L INC.
  • Exapilot, Exaopc, and CENTUM are registered trademarks of Yokogawa Electric Corporation.


  • Agua y agua residual

    Yokogawa ha estado suministrando soluciones de control para la producción hídrica sostenible desarrollando tecnología con mayor eficiencia energética, ayudando a reducir la huella de carbono de las operaciones y fabricando productos de gran solidez que protegen el ambiente contra los contaminantes. Con nuestra tecnología de vanguardia y amplios conocimientos de las aplicaciones, trabajamos con usted para proveer soluciones hídricas sostenibles que impulsen su negocio y agreguen alto valor a lo largo del ciclo de vida de la planta. Nuestra tecnología y nuestros productos mejoran el desempeño de las plantas y garantiza que puedan operar competitivamente en los mercados del agua de hoy, así como reducir sus costos operativos. Yokogawa brinda apoyo en una amplia gama de aplicaciones para el control del agua en los mercados del agua tanto públicos como privados.

    Leer Más
  • En cubierta

    Al igual que su equivalente en tierra, el procesamiento y manejo en cubierta en las plataformas de producción preparan hidrocarburos extraídos para transportación. Yokogawa ofrece soluciones de control integrado y de monitoreo que maximizan la productividad y la disponibilidad de las operaciones en cubierta.

    Leer Más
  • Energía

    A mediados de la década de 1970, Yokogawa inició su participación en el negocio de la energía con el lanzamiento del Sistema de control eléctrico EBS. Desde entonces, Yokogawa ha continuado firmemente con el desarrollo de nuestras tecnologías y capacidades para proveer los mejores servicios y soluciones a nuestros clientes en todo el mundo.

    Yokogawa ha operado la red de soluciones de energía globales para jugar un papel más activo en el dinámico mercado de energía global. Esto ha hecho un posible un trabajo en equipo más unido dentro de Yokogawa, el cual conjunta nuestros recursos globales y nuestra especialización en la industria. Los expertos en el sector de energía de Yokogawa trabajan juntos para brindar a cada cliente la solución que se adapta mejor a sus requerimientos sofisticados.

    Leer Más
  • Energía de biomasa

    Cada vez con mayor frecuencia la biomasa aparece en las noticias en estos días, porque es una fuente de energía renovable que puede ayudar a las centrales termoeléctricas a reducir sus emisiones de dióxido de carbono. Los sistemas de Yokogawa se utilizan en todo el mundo en todo tipo de centrales eléctricas, incluidas las que utilizan biomasa. Las tecnologías de control  y medición de Yokogawa hacen posible que estas plantas operen de manera más eficiente y reduzcan su huella de carbono

    Leer Más
  • Energía geotérmica

    La energía geotérmica puede generar un suministro estable de electricidad durante todo el año, ya que no depende de las condiciones meteorológicas. Además, como no hay combustibles que se quemen por encima del suelo y solo se liberan muy pequeñas cantidades de dióxido de carbono, es amigable con el medio ambiente. Hay abundantes recursos geotérmicos a lo largo del cinturón del Pacífico (también conocido como el "anillo de fuego"), en países como Japón, Filipinas, Indonesia, Nueva Zelanda, México, Costa Rica y Estados Unidos, así como Islandia, Turquía, e Italia que se encuentran en otras regiones de actividad geotérmica. Hasta la fecha, Yokogawa ha participado en 30 proyectos de generación de energía geotérmica en Japón, el Sudeste de Asia y otras regiones, proporcionando una variedad de tecnologías de medición y control que mejoran la confiabilidad y la eficiencia en el mantenimiento de sistemas de generación de energía geotérmica.

    Leer Más
  • Petroquímica y a granel

    Las empresas productoras de petroquímicos, productos inorgánicos o productos intermedios se encuentran bajo una presión constante para equilibrar los costos y los márgenes al suministrar productos a sus clientes de manera oportuna y eficiente, manteniendo al mismo tiempo operaciones seguras y conformes con la normativa. Además, las empresas químicas tienen que adaptarse a la constante fluctuación de los precios de los insumos y la energía y tener la capacidad de proveer al mercado la combinación de productos más rentable.

    Yokogawa ha estado supliendo las necesidades de automatización del mercado de productos químicos a granel globalmente y ha obtenido reconocimiento como líder en este mercado. Con productos, soluciones y especialización en la industria, Yokogawa entiende su mercado y las necesidades de producción y trabajará con usted para proporcionarle una solución confiable y rentable durante el ciclo de vida de su planta.

    Leer Más
  • Procesamiento y fraccionamiento

    El procesamiento de gas natural está diseñado para controlar el punto de condensación del flujo de gas natural y separar los líquidos de gas natural para la venta y distribución. La eliminación de petróleo y condensados, la eliminación de agua, la separación de líquidos de gas natural y la eliminación de azufre y dióxido de carbono son procesos que se emplean para separar las impurezas en el alimentador que proviene de los yacimientos aguas arriba. En el proceso de fraccionamiento se extraen los efluentes líquidos de la planta de procesamiento de gas, que pueden estar compuestos de metano, propano, butano y pentano, para ser tratados en columnas de fraccionamiento separadas, y posteriormente pueden pasar a una planta de tratamiento de impurezas antes de ser vendidos como componentes separados.

    Leer Más
  • Producción flotante, almacenamiento y descarga (FPSO)

    La unidad de Producción flotante, almacenamiento y descarga (FPSO) es una planta de producción flotante en altamar que almacena tanto el equipo de procesamiento como los hidrocarburos producidos. Las unidades de Producción flotante, almacenamiento y descarga (FPSO) son utilizadas por las compañías petroleras para lograr que sea económicamente viable producir petróleo en zonas remotas y en aguas más profundas.

    Leer Más
  • Refinación, procesamiento y almacenamiento de petróleo y gas

    Gracias a sus innovadoras plataformas tecnológicas y su ejecución líder en la industria, Yokogawa tiene buena reputación en el mercado global como socio en soluciones pionero en la integración de tecnologías para todos los aspectos del ecosistema de petróleo y gas, desde el yacimiento hasta la empresa. Soluciones comprobadas que incluyen modelado de negocio predictivo, optimización de plantas y plataformas de automatización altamente confiables están apoyando a los operadores de refinación, procesamiento y almacenamiento a dirigir sus negocios con niveles de eficiencia óptimos. Yokogawa está ayudando a sus clientes a desarrollar sus estrategias de automatización, para garantizar años de utilización de activos altamente eficaz y sostenibilidad.

    Leer Más
  • Terrestre

    La industria de exploración, desarrollo y producción terrestre se enfrenta a exigencias cada vez más altas y mayores desafíos con entornos cada vez más difíciles y hostiles en las que debe funcionar.

    A medida que las oportunidades de los recursos de gas natural no convencionales, en particular el gas de esquisto, están creciendo en América del Norte, la solución total de Yokogawa juega un papel importante al ayudar a los clientes a satisfacer los desafíos de reducir tanto el CAPEX como el OPEX, mientras que las tecnologías integradas mejoradas aumentan la producción. Nuestra experiencia global y local constituye la base de nuestras soluciones totales únicas para satisfacer las necesidades de esta industria. Con expertos en exploración, desarrollo y producción terrestre que trabajan en oficinas por todo el mundo, ofrecemos un soporte rápido y extenso para satisfacer las demandas de nuestros clientes.

    Leer Más

Productos y Soluciones Relacionadas

  • Procedural Automation (Exapilot)

    Procedural Automation (Exapilot) provides a flexible methodology to capture, optimize and retain procedural knowledge in a process plant while meeting requirements in reliability, flexibility, and lifecycle costs.

    Leer Más
  • Sistema de Control Distribuido (DCS)

    Yokogawa ofrece una infraestructura operacional crítica para la automatización de procesos. Nuestro sistema de control distribuido (DCS) permite la automatización y el control de los procesos industriales y un mejor desempeño empresarial. Más de 10,000 plantas confían en el DCS de Yokogawa para cumplir con sus objetivos de producción.

    Leer Más