Job Cancellation Control for Print Apparatus
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Solution Overview
Problem
Existing job processing systems lack a mechanism to differentiate between job types during cancellation, leading to unintended cancellations of critical jobs like fax reception and automatic report jobs, which can cause inconvenience and additional work for users.
Innovation Solution
A job processing apparatus with a control unit that determines whether simple job cancellation is permitted based on the job type, preventing accidental cancellations of specific job types like fax reception and automatic report jobs by requiring user confirmation or selective cancellation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple operation is used to cancel jobs, then the ease of operation is improved, but the reliability deteriorates due to unintended cancellations of critical jobs
Solution Approach 1:
The patent applies local quality by differentiating cancellation rules based on job type. Critical jobs (fax reception, automatic report) have restricted cancellation while other jobs allow simple cancellation. This is implemented through the control unit determining whether simple cancellation is permitted based on the specific job type, allowing different cancellation behaviors for different job categories.
Solution Approach 2:
The patent implements feedback by notifying the user when a critical job is selected for cancellation. The notification unit informs the user that the job cannot be canceled by simple operation, providing feedback that prevents unintended cancellation. This feedback mechanism allows users to understand the restriction before attempting cancellation.
2Device complexity
If all jobs are treated uniformly during cancellation, then the device complexity is reduced, but the adaptability deteriorates due to inability to handle different job types differently
Solution Approach 1:
The patent makes the cancellation mechanism adaptive by implementing job-type-specific cancellation rules without significantly increasing overall system complexity. The control unit determines whether simple cancellation is permitted based on the specific job type, allowing differentiated handling of critical versus non-critical jobs through a unified decision-making process.
Solution Approach 2:
The patent achieves universality by creating a multi-functional cancellation system that handles both simple and restricted cancellation scenarios through a single unified mechanism. The control unit universally applies the cancellation determination logic across all job types, making the system adaptable to different job categories while maintaining a consistent operational framework.
Data Source
AI summary
Job cancellation with a simple operation is prevented depending on a type of a job to be cancelled. A job processing apparatus includes a holding unit configured to hold a job subjected to execution, a receiving unit configured to receive a cancellation instruction for canceling execution of the job held in the holding unit, and a control unit configured to perform control in response to reception of the cancellation instruction by the receiving unit so that when the job held in the holding unit is of a specific type, the job is not canceled and when the job held in the holding unit is of a type other than the specific type, the job is canceled.