Multi-model mixed production in the production processes 　other than the body assembling process Painting process All models produced at each Plant are painted on one painting line in a mixed manner. Off-line robot teaching by the use of Robot-Simulation CAD is adopted to spraying and sealing robots used in the painting process as well. Vehicle assembling process In the multi-model mixed production of the vehicle assembling process which heavily relies on manual labor, it is necessary to devise an efficient parts supply system to cope with limited space available close to the line and a quality assurance system free from wrong and/or missing parts an so on. To resolve these problems, we have been continuously tackling with the following two important measures. �@Small quantity parts charging/synchronized parts delivery by precise parts charging scheduling Small quantity parts charging to the production line side was realized by precise scheduling of the out-sourced parts, thus, the difficulty of efficient use of the parts charging space at the production line side inherent to the multi-model mixed production was eliminated. �AQuality assurance by the introduction of the parts spec. instruction system Concerns which may jeopardize the ideal state of quality assurance such as wrong parts, missing parts and incorrect assembling have surfaced because of the transfer of workers and employment of limited-term employees due to production fluctuation in the multi-model mixed production. In order to more securely assure the product quality, we have developed a spec. instruction system in which even "unskilled workers" will not make mistakes such as wrong parts, missing parts and incorrect assembling with a target of "new quality improvement activities and establishment of flexible production line", and we have put this system into our production lines. In this system, the production instruction information is sent from the host process computer (H-V90) to the personal computers provided at each process and transformed into; ・ instruction by the lamps on the parts racks, ・ indication of part codes by means of large character displays, ・ issuance of work order cards for specially equipped vehicles/non mass-production vehicles by the use of enlarged characters and so on. The introduction of this system helped to shorten the training period of the workers. As for the spec. instruction by the lamps on the parts racks, we have continuously spread this system with a prerequisite that it must be provided to all parts racks for two or more specifications. As a result, we have now accomplished a 100% introduction rate in both Shonan and Kyoto Plants. ・ We owe it a great deal to this system that our multi-model mixed production can be carried out smoothly even under our work force organization where transfer of workers takes place frequently. ・ It contributes a great deal to smooth operation of this system that maintenance/improvement of this system is left to the workers at the work site. 　Epilogue So far, we have introduced a part of the technology NISSAN SHATAI can be proud of in this field. We are still aiming at creating more advanced production plant by continuously making efforts in further improving the technology we have introduced here.