EP2414903A1 - Dispositif et procédé de réalisation d'un modèle de processus - Google Patents

Dispositif et procédé de réalisation d'un modèle de processus

Info

Publication number
EP2414903A1
EP2414903A1 EP10707854A EP10707854A EP2414903A1 EP 2414903 A1 EP2414903 A1 EP 2414903A1 EP 10707854 A EP10707854 A EP 10707854A EP 10707854 A EP10707854 A EP 10707854A EP 2414903 A1 EP2414903 A1 EP 2414903A1
Authority
EP
European Patent Office
Prior art keywords
description
steps
model
phase
structure description
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10707854A
Other languages
German (de)
English (en)
Inventor
Michael Pirker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2414903A1 publication Critical patent/EP2414903A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/408—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by data handling or data format, e.g. reading, buffering or conversion of data
    • G05B19/4083—Adapting programme, configuration
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Definitions

  • the present invention relates to a device which is suitable for semantically enriching and structuring existing process models and to a corresponding method.
  • the invention further relates to a computer program product for carrying out the method, and to a data memory which stores the computer program product.
  • Technical apparatuses such as production lines or production facilities, typically include a variety of components. As technology advances, such devices become increasingly complex from a technical point of view. This results in a variety of possible malfunction of the equipment, making their maintenance difficult. Typically, failure causes of such complex devices are no longer immediately recognizable. A maintenance of complex equipment is complex and can only be performed by specialized personnel. Corresponding domain knowledge must be carefully maintained.
  • step-by-step instructions are typically not intended for machine processing.
  • Electronic operating instructions regularly have text and illustrations, which are read out and implemented by a maintenance technician.
  • An automated and information-technical processability of step-by-step instructions is not possible due to the lack of structuring of the operating instructions.
  • step-by-step instructions intended for both interactive use by users and by software applications are represented by simple sequences of human-readable and machine-readable action steps.
  • Partial information about step-by-step instructions is hereby typically created and managed simply or redundantly in the respective software applications.
  • the information for the user mostly as text and illustrations, can be processed separately.
  • process descriptions are typically only weakly structured to make them intuitive to a human user.
  • processes are described by means of a complex structure, which are only accessible to machine processing. Consequently, process models used in accordance with conventional methods can not be created, maintained and / or executed by both human users and machine devices.
  • an apparatus for creating a process model comprising:
  • a structure providing unit for providing a process structure description, the process structure description indicating a structure of a generic process; a process description unit for providing a process description, the process description indicating process steps and at least one temporal or causal dependence on the process steps; and a relationship production unit that establishes at least one relation between the provided process structure description and the provided process description for creating the process model.
  • the process model includes a process structure description, a process description and a mapping of characteristics of the process description to characteristics of the process structure description.
  • a process structure description can be viewed as a meta-model that describes a generic process.
  • a process structure description models individual process steps as well as temporal dependencies between the individual process steps.
  • a temporal dependency between individual process steps is z.
  • Temporal dependencies between process steps can establish an order on the process steps.
  • Process steps can also be causally dependent on each other.
  • a causal dependence describes z. For example, when a particular selection of process steps has been performed, a further selection of process steps may be performed.
  • the process structure description defines that a process has multiple phases, with each phase having any number of process steps.
  • the process structure description can also be defined as the basic framework of a process, which can be expanded as desired.
  • a generic process is z.
  • a generic process is z.
  • As a start phase any number of phases and / or a final phase. Such an abstract, generic process may be refined and / or specialized for any domain. For example, a startup phase may be opening a document, another phase may be editing the document, and a final phase may describe saving and closing a document.
  • a relation between the provided process structure description and the provided process description can e.g.
  • an abstract step can be defined in the process structure description, which is present in the process description as a concrete step, thus establishing a relation between a feature of the process structure description and the process description It is particularly advantageous here for each concrete step of the process description to be able to identify or assign an abstract step in the process structure description, thus enabling step-by-step instructions to be structured and semantically enriched
  • this integration can be accomplished, for example, by establishing at least one relation between the provided process structure description and the provided process description.
  • the created process model includes the process structure description, the process description, as well as the relations between the process structure description and the process description.
  • the provided process structure description may be in the form of a formal model, a propositional model, a description logic model, a predicate logic model, a rule-based model, a specification, an ontology, a metastrogram definition, and / or a natural linguistic text. This has the advantage that the process descriptions and the process structure descriptions are machine-readable and can be checked automatically.
  • the process structure description may include a process, a phase, a process step, a startup phase, a final phase, a predecessor phase, a final phase, a sequence of processes, a sequence of phases, a sequence of process step and / or have a step sequence. This has the advantage that the process structure description indicates a flexible meta-model of a process.
  • a process has at least one phase.
  • a phase includes at least one process step. This has the advantage that a process with arbitrary granularity can be represented. In addition, iterations and / or orders can be defined on any subprocesses.
  • Process steps can be performed in parallel, alternatively, optionally and / or iteratively. This offers the advantage that any sequence of process steps can be modeled.
  • z. B. transitive relations can be defined on individual process steps. For example, it can be defined that if there is a dependence between a process step A and a process step B, as well as a process step B and a process step C, this dependence also applies between the process steps A and C. This is particularly advantageous when modeling temporal relations. So z. B. be defined that, if a process step A takes place before a process step B, and a process step B takes place before a process step C, the process step A is transitive before the process step C is performed.
  • the provision of the process description takes place in one possible embodiment as a function of readout of a sensor. This has the advantage that user inputs can be monitored by means of a sensor, and from this a process description can be created.
  • the reading out of a sensor takes place z.
  • a user For analyzing a screen shot.
  • a user performs several process steps on a computer Anläge, where the individual process steps are identified by means of several screen shots.
  • the process description can be provided in accordance with an operating manual, a user manual, process documentation and / or user input. This has the advantage that already existing documentation can be reused to provide the process description.
  • the provision of the process structure description and / or the process description can be done by reading a data memory. This offers the advantage that existing process structure descriptions and / or already existing process descriptions can be reused. So it is z. For example, it is possible to use a process structure description in different domains.
  • the device for creating a process model has a reasoning unit which is suitable for checking the consistency of the process structure description. This has the advantage that the process structure description is error-free and can thus be reused in any number of domain-specific process descriptions.
  • a reasoning unit is suitable for extracting implicit knowledge from an existing knowledge base.
  • a reasoning unit is also suitable for generating new knowledge from an existing knowledge base by means of inference.
  • the invention further relates to a method for creating a process model, in particular using the devices already described, and comprises the following steps:
  • the invention further relates to a computer program product for carrying out the described method.
  • the invention further relates to a data memory which stores the computer program product.
  • the invention thus provides a method and a device which make it possible to create a process model which semantically enriches and structures processes.
  • the generated process model is intuitive to a human user, despite its extensive expressiveness, and is further, due to the use of arbitrary forms of representation, such B. a formal model, machine-readable.
  • the proposed method and the proposed device allow the process structure description to be definable independently of the specific process description, and thus reusable with respect to further domain-specific process descriptions.
  • Fig. 1 is a structured process model as may be created in the present invention
  • Fig. 2 is a hierarchical structure of a step-by-step guide according to an aspect of the present invention
  • FIG. 3 is a block diagram of an apparatus for creating a process model according to one aspect of the present invention.
  • FIG. 4 shows a detailed block diagram to illustrate an embodiment of a device for creating a process model according to the present invention
  • FIG. 5 shows a flow chart for illustrating an embodiment of the method according to the invention for creating a process model
  • FIG. 6 shows a detailed flow chart for illustrating an embodiment of the method according to the invention for creating a process model.
  • FIG. 1 shows a created process model 2 according to one aspect of the present invention.
  • the process model 2 comprises a process structure description 3, a process description 4, and produced relations 5A, 5B, 5C, 5D.
  • the definition of the process structure description 3 takes place by means of description logic. scher modeling approaches. This z. B. OWL-DL can be used. Alternatively or in combination with OWL-DL, other OWL variants, DAML + OIL or RDFS, can also be used. It is particularly advantageous here that the process structure description 3 is implemented as a formal model. Consequently, further propositional, description-logical, predicate-logical and / or rule-based models are suitable for defining the process structure description 3.
  • the definition of the process structure description 3 is made by the description logic concepts and relations of the OWL-DL.
  • an ontological concept comprises a process, a phase and / or a step, this being drawn in circles in the present FIG.
  • the defined and logical concepts are pairwise related by means of a definition of ontological relations. Consequently, it is possible to assign individual steps to individual phases.
  • the relations are represented in the present Fig. 1 by lines connecting the circles representing concepts.
  • a relation can also be defined reflexively, d. h., That a step in turn may have further steps.
  • the ontological relation can also be defined between a variety of concepts. For example, classes of process steps can be defined.
  • Ontological relations can also be used to implement sequences of phases within a step-by-step guide. Here it can be defined in the process structure description 3 that certain phases form a sequence in a specific sequence.
  • the ontological concepts defined in the process structure description 3 can also have further attributes.
  • a process step which is modeled as an ontological concept, has a descriptive text.
  • a descriptive text provides information on how the corresponding process step is to be carried out.
  • the process structure description 3 defines that a generic process has the following meta-model:
  • the generic process consists of one or more phases.
  • a phase encapsulates one or more possible steps.
  • a step is an action to be performed by humans or machines.
  • Phases are arranged in sequence, e.g. B. predecessor or successor phases. That is, sequences are used to specify sequences of step sets. Steps within a phase are not ordered into sequences, i. that is, one or more steps of a phase can be performed in any order. Not every step in a phase has to be completed. The same step within a phase can be run more often, or the same step within a phase can be run exactly once, but at least one step of a phase must be run to activate the follow-up phase.
  • the generic process starts with a startup phase.
  • the starting phase is an excellent phase that has no previous phase.
  • the generic process ends with a final phase.
  • the final phase is an excellent phase that has no successor phase.
  • the generic process may have parallel sequences that have at least one of the following properties:
  • Each phase, except the start phase, has at least one predecessor phase
  • Each phase, except the final phase, has at least one successor phase
  • Each phase, except the start phase, can have several predecessor phases -
  • Each phase, except the final phase, can have several successor phases
  • phase P2 can be made optional, e.g. B. Phase Sequence Phase Pl -> Phase P2 -> Phase P3 can be supplemented by a parallel phase sequence Phase Pl -> Phase P3, making Phase P2 optional
  • the process model 2 shown in FIG. 1 also has a process description 4.
  • the process description 4 may in this case comprise a plurality of process steps, these process descriptions being in a temporal and / or causal relationship to one another.
  • processes are defined as a sequence of individual process steps.
  • the process description 4 describes a step-by-step instruction.
  • the step-by-step instructions are available in an electronic format, which allows to identify individual process steps of the step-by-step instructions. Furthermore, it may be possible to identify individual phases in the step-by-step instructions. So z.
  • a chapter in a manual which has a step-by-step instructions
  • a chapter for a phase predefined as well as a sub-chapter and / or paragraph are provided for a step.
  • a mapping of the process steps of the process description 4 to steps that are defined in the process structure description 3 takes place.
  • 4 phases can be identified in the process description.
  • the instantiated process steps of the process description 4 in the present exemplary embodiment can be carried out in accordance with at least one of the following possibilities: - Execution of parallel steps, due to parallel phase sequences
  • the process structure description 3 may have further elements that z. For example, you can model that sequences of phases can be traversed several times within a step-by-step guide, or you can create a hierarchical breakdown of
  • step-by-step instructions can be arranged modularly to more complex step-by-step instructions.
  • Figure 2 describes a hierarchical breakdown of a process according to one aspect of the present invention.
  • a process 10 which represents a maintenance process of a machine, according to one aspect of the present invention is structured and semantically enriched.
  • a process structure description 4 is provided.
  • the process structure description includes process 10, as well as phases IIA and IIB.
  • Phase IIA is subdivided into process steps 12A, 12B, 12C and 12D in the present exemplary embodiment.
  • process step 13A starting the machine
  • process step 13B reading out parameters
  • process step 13C unscrewing the housing
  • process step 13D exchange the module
  • process step 13E function test
  • process steps 13A, 13B, 13C and 13D are described in a chapter of the user manual.
  • process steps 13A, 13B, 13C, and 13D may each be associated with abstract process steps 12A, 12B, 12C, and 12D, which are included in phase IIA.
  • the flat process structure consisting of the process steps 13A, 13B, 13C and 13D is semantically enriched and assigned to a phase IIA which is included in the process 10.
  • process step 13E "functional test" is described in another chapter of the user manual than the already described process steps 13A, 13B, 13C and 13D. Consequently, it is possible to carry out the process step 13E in a separate abstract process step 12E, which in turn is included in phase IIB.
  • the tree structure shown in Figure 2 is both intuitive to a human user and machine processing accessible.
  • the process steps 13A, 13B, 13C, 13D and 13E are identified by means of a rule-based recognition method.
  • a corresponding rule base can, for. B. in a description language, such as. For example, SWRL.
  • it can be defined in the rule base, such as an assignment of the concrete steps 13A, 13B, 13C, 13D to the abstract steps 12A, 12B, 12C, 12D, and 12E took place.
  • the rule base can be analyzed by means of a rule engine and / or a reasoning unit, whereby further features of the process structure description 4 can be taken into account.
  • a process can also be defined as a sequence of states.
  • a process can thus be defined as a sequence of state transitions. Accordingly, in this case, the process structure description 3 refers to a state machine.
  • FIG. 3 shows a block diagram of a device 1 for creating a process model 2 according to one aspect of the present invention.
  • the device 1 comprises a structure providing unit 20 for providing a process structure description 3, wherein the process structure description 3 indicates a structure of a generic process, a process description unit 21 for providing a process description 4, wherein the process description includes 4 process steps and at least one temporal or causal dependence on the process steps indicates and a Relationsher- position unit 22, which establishes at least one relation 5A, 5B, 5C, 5D between the provided process structure description 3 and the provided process description 4 for creating the process model 2.
  • FIG. 4 shows a detailed block diagram of a device 1 for creating a process model 2 according to an embodiment of the present invention, and differs from the device 1 shown in FIG. 3 as follows:
  • the structure providing unit 20 has a reasoning unit 32.
  • the reasoning unit 32 is suitable for checking a process structure description 3 for errors or consistency.
  • the process structure Structure description 3 can be read out of a data memory 30 by means of the structure providing unit 20. This can be z. B. done by means of a network.
  • the process structure description 3 is z. B. as a formal model, which can be checked by means of rules, which are also stored in the data memory 30.
  • the process description unit 21 has a sensor 33 which is suitable for detecting the process description 30. Based on predefined rules, which z. B. are stored in the data memory 31, the process description unit 21 can create a process description 4 depending on a sensor result.
  • a sensor can, for. For example, it may be an image recognition sensor that analyzes an action instruction that has multiple graphical representations. For example, an existing manual contains several graphical representations of process steps, with the process steps labeled in each case.
  • the visual sensor 33 is suitable for reading the labeling from the respective graphical representation, and assigning the readout label to individual process steps. Corresponding techniques, which are required in particular for image processing, can be read out of the data memory 31 by the process description unit 21.
  • the provided process structure description 3, as well as the provided process description 4, are transmitted to the relation production unit 22.
  • the relationship production unit 22 may have a data store that provides rules that describe how a relation is created between the process structure description 3 and the process description 4.
  • the described units of the device 1, in particular the structure providing unit 20, the process description unit 21, the relation making unit 22, and the reasoning unit 32 may be referred to as a processor, a microprocessor, a computer, a computer system, a central computer Processing unit, an arithmetic unit and / or be implemented as a circuit.
  • the data memory 30 and 31 can be replaced by any type of storage media, eg. As a hard disk, flash disk, USB stick, floppy disk, floppy disk, CD, DVD, Bluray disk, magnetic tape, tape and / or as a removable disk are formed.
  • the data stores 30 and 31 may also be implemented as a database server.
  • the data memories 30 and 31 are read in a possible embodiment via a network.
  • a network includes at least one hub, a switch, a router, a server, an access point, a client, a sender, a receiver, a network card and / or other network-typical components.
  • FIG. 5 describes a flowchart of a method for creating a process model 2, in particular using a device 1, and comprises the following steps:
  • a system administrator performs an installation process of software. To do this, he runs an installation program. The installa- The system administrator guides the system administrator through the installation process through a sequence of virtual windows displayed on a screen. The process description unit 21 uses screen shots to record the individual process steps, and names the individual steps with window titles that are displayed on each virtual window.
  • the title of a first virtual window is "select components for installation” and a second window is "specify installation path”.
  • the structure providing unit 20 provides a process meta model, which describes that repetitive process steps are combined in phases. Because the system administrator often the process steps
  • the reasoning unit 32 recognizes that the two process steps are a phase that can be iteratively traversed.
  • a process model 2 which represents both the installation process as a process description 4, as well as a process structure description 3 provides.
  • FIG. 6 shows a detailed flow chart of a method for creating a process model 2 and has the following method steps:
  • a first method step 200 concepts are defined which represent at least one process, at least one phase and / or at least one step.
  • Concepts are here z. Phases IIA and IIB or process steps 12A, 12B, 12C and 12D.
  • further attributes are defined, which are assigned to the respective concept. So z.
  • a specific description text can be assigned to a concept.
  • a definition of relations to the concepts described in method step 200 takes place. It is z.
  • a phase comprises a certain number of steps, and that certain steps must be taken each time the phase is executed, or that certain steps are optionally performed.
  • it can be defined in method step 201 which steps can take place in parallel. In addition, it can be described when certain phases must be cycled through or when cycles must be avoided.
  • a subsequent method step 202 automatic detection of process steps takes place.
  • This can be z. B. by means of capturing screen shots are performed. Screen shots are taken at regular intervals while a specific process is running. On the basis of the screen shots, individual process steps can then be identified.
  • This can be z. For example, in response to capturing labels of items displayed on a monitor when executing a process. In the execution of the process z. B. opened several virtual windows of an operating system, which have a label. Consequently, it can be detected in method step 202 when a new virtual window is opened, or a new process step is executed.
  • a temporal dependency is defined between the process steps detected in method step 202.
  • This can be z. B. by means of an analysis of the order of opened virtual windows.
  • z For example, certain sequences may be identified that indicate that cycles are occurring at a particular point in the execution of the process and / or that individual process steps are performed iteratively.
  • a read-out of a rule base is performed, which describes when relations exist between the concepts defined in method step 200 and the process steps detected in method step 202.
  • a subsequent method step 205 the rules read out in method step 204 are applied to the features defined in method steps 200 to 203.
  • they are created in a subsequent process step 206.
  • a process model 2 is created which models a process with semantic information and documents it accordingly.
  • step 207 a check of the consistency of the created model, z. By means of the reasoning unit 32.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Stored Programmes (AREA)
  • General Factory Administration (AREA)

Abstract

La présente invention concerne un procédé et un dispositif (1) pour la réalisation d'un modèle de processus (2). Ledit modèle de processus (2) présente une grande force évocatrice et peut être utilisé aussi bien par un personne usant de son intelligence intuitive que par une machine. La réalisation du modèle de processus (2) selon l'invention a lieu au moyen de la mise à disposition du modèle de processus concret, d'un métamodèle de processus, de même que d'une transposition d'étapes de processus concrètes aux étapes de processus abstraites du métamodèle. Le métamodèle de processus défini dans l'invention est particulièrement avantageux dans le sens où il peut être réutilisé pour d'autres modèles concrets de processus appartenant à des domaines spécifiques. L'invention permet de d'établir, de structurer et d'enrichir sur le plan sémantique des modes d'emploi conçus étape par étape.
EP10707854A 2009-03-30 2010-02-18 Dispositif et procédé de réalisation d'un modèle de processus Withdrawn EP2414903A1 (fr)

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PCT/EP2010/052069 WO2010112264A1 (fr) 2009-03-30 2010-02-18 Dispositif et procédé de réalisation d'un modèle de processus

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