Browse Prior Art Database

Method for Processing Production Progress Data with Error Correction

IP.com Disclosure Number: IPCOM000117140D
Original Publication Date: 1995-Dec-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 3 page(s) / 118K

Publishing Venue

IBM

Related People

Asaka, S: AUTHOR [+4]

Abstract

Disclosed is a method for monitoring manufacturing progress in factories which supports tracking in process inventory, and recovery from input miss-operation by workers. The advantage of this method is to simplify inventory asset management, which has been complicated and time-consuming work in mass production factories. This method assumes manufacturing plants that have the following features. o A certain amount of products are moved from one process the next all at once by a vehicle. o When a vehicle arrives at or departs from a process, the event and related information is reported to a data server on the fly. o When a vehicle arrives at a process, the vehicle is assigned to a equipment in the process.

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Method for Processing Production Progress Data with Error Correction

      Disclosed is a method for monitoring manufacturing progress in
factories which supports tracking in process inventory, and recovery
from input miss-operation by workers.  The advantage of this method
is to simplify inventory asset management, which has been complicated
and time-consuming work in mass production factories.  This method
assumes manufacturing plants that have the following features.
  o  A certain amount of products are moved from one process the next
      all at once by a vehicle.
  o  When a vehicle arrives at or departs from a process, the event
      and related information is reported to a data server on the
fly.
  o  When a vehicle arrives at a process, the vehicle is assigned to
a
      equipment in the process.
  o  Process status of products in each equipment is also reported to
      the data server when the process is completed.
  o  Products, vehicles, and equipments have their own unique ID
      number.

      This method consists of three client systems: vehicle tracking,
process status monitoring, product progress monitoring.
  1.  Vehicle tracking client
        Once a vehicle arrives at a process, the client sends the
       arrival time, the vehicle ID number, and an ID number of the
       equipment that is assigned to the vehicle.  This information
is
       used to maintain relations between a vehicle and products via
an
       equipment that is processing the products.  When a vehicle
       departed from a process, this client sends the departure time,
       and the vehicle ID number.  After this event, a data server
       unbinds the vehicle-equipment assignment, and then confirms
that
       the vehicle exists between the previous process and the next.
  2.  Process status monitoring client
        This client sends process status data to a data server,
       just after the process has completed.  Unexpected status of a
       product is reported to the server in order to resolve
       inconsistency in the data.  Overall structure of the algorithm
is
       as follows.  It must be noted here that the conditions below
are
       checked by the data server.
  When status data of a product is send from a client of a process,
    IF (There is no inconsistency in the product status)
  IF (A vehicle carrying the product is confirmed to be in the
process)
    DO Procedure-A
  ELSE IF (The vehicle is not confirmed to be in the process)
    DO Procedure-B
  ENDIF
  ELSE IF (There is some inconsistency in the product status)
    IF (A vehicle is assigned to an equipment via the process)
      DO Procedure-C
    ELSE IF (Every vehicle is not assigned to any equipment
              in the process)
      DO Procedure-D
    ENDIF
  ENDIF

     ...