Standard Work Time Updating System with Reliability Verification
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Solution Overview
Problem
Existing standard work time updating methods either require an observer or classifier, or are prone to false declarations when workers record their own work times, leading to unreliable data.
Innovation Solution
A system where workers declare work time points using a PDA, and a reliability determination mechanism checks if the declared times fall within a predetermined range or exceed a value, updating the standard work time only if the data is reliable, and excluding or canceling updates for unreliable data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If workers self-declare work time points using a stopwatch or PDA, then the need for observers or classifiers is eliminated and operation simplicity is improved, but data reliability deteriorates due to potential false or erroneous declarations
Solution Approach 1:
The system implements feedback mechanisms where work time data declared by workers is automatically verified against work procedure sequences and standard work times. The server sends feedback regarding data consistency, and unreliable data is automatically identified and handled through predefined procedures, resolving the contradiction between self-declaration simplicity and data reliability.
Solution Approach 2:
A server acts as an intermediary between workers and the standard work time management system. The server receives declared work time data, performs automatic reliability determination by checking against work procedures and statistical distributions, and manages updates. This intermediary layer maintains operation simplicity while ensuring data reliability through automated verification.
2Reliability
If observers or classifiers are used to record and analyze work times, then data reliability is improved through professional measurement, but device complexity and operational burden increase
Solution Approach 1:
The system enables self-service where workers independently declare their own work time points using PDAs or stopwatches. The server automatically performs the analysis and reliability determination that would traditionally require observers or classifiers. This eliminates the need for additional personnel while maintaining data reliability through automated verification processes.
Solution Approach 2:
The patent replaces the mechanical system of human observers physically measuring and recording work times with an automated electronic system. PDAs and servers perform the measurement, classification, and reliability determination functions that previously required human observers, reducing system complexity while maintaining or improving reliability.
3Productivity
If all declared work time data is used for updating standard work times, then productivity is improved through continuous updates, but manufacturing precision deteriorates due to inclusion of unreliable data
Solution Approach 1:
The system performs partial updates by selectively processing only reliable work time data for standard work time updates. The server determines reliability for each data point and performs updates only when data meets reliability criteria, rather than universally updating all declared times. This maintains productivity through continuous monitoring while ensuring precision through selective updating.
Solution Approach 2:
The system changes the parameter of data acceptance from unconditional to conditional based on reliability determination. By introducing reliability as a filtering parameter, the system maintains high update frequency for reliable data while excluding unreliable data, thus preserving both productivity and manufacturing precision in the standard work time updates.
Data Source
AI summary
The purpose of the invention is to provide a standard work time updating method and system in which a work time is declared by a worker without requiring an observer or the like and the reliability of the updated data of standard work time can be prevented from being degraded due to a worker's false or erroneous declaration. To achieve this purpose, for example, the standard work time updating system is configured as follows. When a reliability determination unit (24) determines that a work time required for work and declared by a worker is not departed from a predetermined range in the work time data distribution of the work stored in a database, a standard work time for the work is updated to a standard work time calculated from the declared work time, and otherwise, the standard work time is not updated. In addition, when it is determined that a work area estimated by a work area estimation unit (23) matches a work area declared by a worker, a standard work time for the work is updated to the calculated standard work time, and otherwise, the standard work time is not updated.