# US 2022/0197266 A1 · System, method, and recording medium having program recorded thereon > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0197266 A1 - Document ID: US20220197266A1 - Status: Published application - Kind: A1 - Application number: 17/692,110 - Filed: 2022-03-10 - Published: 2022-06-23 - Earliest claimed: 2019-09-30 - Assignees: Yokogawa Electric Corporation - Applicants: Yokogawa Electric Corporation - Inventors: Takashi NAITO; Paul KENNEDY - Web page: https://patentgrep.com/patent/US20220197266A1 ## CPC - G05B 19/41885: {characterised by modeling, simulation of the manufacturing system} - G06Q 10/06: Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling - G05B 17/02: electric - G05B 19/41865: {characterised by job scheduling, process planning, material flow} - G05B 19/41875: {characterised by quality surveillance of production} - G06Q 50/04: Manufacturing - G05B 2219/23123: Production report - Y02P 90/30: Computing systems specially adapted for manufacturing - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract It is rare for the operation of the production site to proceed according to the initially formulated plan, and many deviations occur between the actual operation and the plan. Accordingly, the performance of the production site is preferably analyzed while considering these deviations. Provided is a system including a planning section that generates a production plan for controlling a production site during a target interval, using a planning model; a retrospective planning section that generates a retrospective plan, which is a production plan that retrospectively reflects at least one of unplanned events that occurred after generation of the production plan, using the planning model; and an analyzing section that analyzes production performance of the production site during the target interval, based on the production plan and the retrospective plan. ## Claims ### Claim 1 A system comprising: a planning section that generates a production plan for controlling a production site during a target interval, using a planning model; a retrospective planning section that generates a retrospective plan, which is a production plan that retrospectively reflects at least one of unplanned events that occurred after generation of the production plan, using the planning model; and an analyzing section that analyzes production performance of the production site during the target interval, based on the production plan and the retrospective plan. ### Claim 2 (depends on 1) The system according to claim 1, wherein the retrospective planning section generates the retrospective plan by changing one or more factors to be input to the planning model in a manner to reflect at least one of the unplanned events. ### Claim 3 (depends on 2) The system according to claim 2, wherein the retrospective planning section generates the retrospective plan by changing one or more factors corresponding to each of uncontrollable events that could not be accounted for at the time when the production plan was generated, from a value thereof at the time when the production plan was generated. ### Claim 4 (depends on 3) The system according to claim 3, wherein the retrospective planning section generates a plurality of cases of the retrospective plan, where each case is generated by sequentially changing one event at a time among the uncontrollable events, and changing the one or more factors corresponding to the one event from the values thereof at the time when the production plan was generated, and the analyzing section analyzes the production performance for each event, based on the production plan and the plurality of cases of the retrospective plan. ### Claim 5 (depends on 3) The system according to claim 3, wherein the retrospective planning section generates the retrospective plan without changing factors other than the one or more factors corresponding to each of the uncontrollable events, from the values thereof at the time when the production plan was generated. ### Claim 6 (depends on 4) The system according to claim 4, wherein the retrospective planning section generates the retrospective plan without changing factors other than the one or more factors corresponding to each of the uncontrollable events, from the values thereof at the time when the production plan was generated. ### Claim 7 (depends on 1) The system according to claim 1, wherein the analyzing section analyzes the production performance further based on actual operation at the production site. ### Claim 8 (depends on 2) The system according to claim 2, wherein the analyzing section analyzes the production performance further based on actual operation at the production site. ### Claim 9 (depends on 3) The system according to claim 3, wherein the analyzing section analyzes the production performance further based on actual operation at the production site. ### Claim 10 (depends on 4) The system according to claim 4, wherein the analyzing section analyzes the production performance further based on actual operation at the production site. ### Claim 11 (depends on 1) The system according to claim 1, wherein the analyzing section analyzes a deviation of the production performance, caused by the occurrence of at least one of the unplanned events, based on the production plan and the retrospective plan. ### Claim 12 (depends on 2) The system according to claim 2, wherein the analyzing section analyzes a deviation of the production performance, caused by the occurrence of at least one of the unplanned events, based on the production plan and the retrospective plan. ### Claim 13 (depends on 1) The system according to claim 1, wherein the retrospective planning section generates, as the retrospective plan, an optimal production plan that can be obtained when the occurrence of at least one of the unplanned events is retrospectively reflected. ### Claim 14 (depends on 2) The system according to claim 2, wherein the retrospective planning section generates, as the retrospective plan, an optimal production plan that can be obtained when the occurrence of at least one of the unplanned events is retrospectively reflected. ### Claim 15 (depends on 1) The system according to claim 1, further comprising: a control section that controls the production site based on the production plan. ### Claim 16 (depends on 2) The system according to claim 2, further comprising: a control section that controls the production site based on the production plan. ### Claim 17 (depends on 1) The system according to claim 1, wherein the planning model is a linear programming model. ### Claim 18 (depends on 2) The system according to claim 2, wherein the planning model is a linear programming model. ### Claim 19 A method comprising: generating a production plan for controlling a production site during a target interval, using a planning model; generating a retrospective plan, which is a production plan that retrospectively reflects at least one of unplanned events that occurred after generation of the production plan, using the planning model; and analyzing production performance of the production site during the target interval, based on the production plan and the retrospective plan. ### Claim 20 A recording medium recorded thereon a program that, when executed by a computer, causes the computer to function as: a planning section that generates a production plan for controlling a production site during a target interval, using a planning model; a retrospective planning section that generates a retrospective plan, which is a production plan that retrospectively reflects at least one of unplanned events that occurred after generation of the production plan, using the planning model; and an analyzing section that analyzes production performance of the production site during the target interval, based on the production plan and the retrospective plan.