Project Narrative

Final Solution

Design Process

Week 1 (Feb. 10, 2025):

• Initial problem statement, constraints, and objectives/metrics
• Created a testing plan for each objective

Week 2:

• Narrowed our focus to a more specific topic (cooking)
• Created a functional analysis chart, stating each function and multiple means

Week 3:

• Created a decision matrix of all individual prototypes suing criteria connected to objectives
• Found top two concepts
• Created a refined project timeline that included refining initial prototype, CADing, 3D printing, assembling, and testing

Week 4:

• Created an outline for the creation of the refined prototype like its purpose, level of fidelity, etc
• Created objectives and metrics for the refined prototype
• Described how design concept was refined and identified what features are different than initial concept
• Developed present testing plan of prototype for each objectives and metric
• Developed future testing plan with objectives

Week 5:

• Stated quantitative objectives/metrics, qualitative objectives/metrics, constraints/metrics
• Reviewed current testing plan and changed objectives to qualitative as they are difficult to quantify with the tools we have

Week 6 (March 31, 2025):

• Executed testing plan for quantitative and qualitative objectives, as well constraints
• Stated and discussed the results of each testing plan
• Discussed the modifications created through the testing results

Kimberly, our client, shared her difficulties with knife handling in the kitchen due to limited dexterity and vision loss, which put her at risk of accidental cuts. To address this, our team worked on designing an adjustable knife blade guard that would provide finger protection and be easy for her to use independently. Our goal and problem statement was to create a safe, versatile solution that could fit a variety of knives, giving Kimberly more confidence and security while working in the kitchen.

Objectives:

• Lightweight and easy for everyday use. Easy to use on her own
• Should withstand everyday use and doesn’t rely on charging/frequent battery changing. Client needs to use this device for her daily tasks
• Should enable the user to operate it on her own without relying on others for activation or assistance. Independence is a key concern for the client
• Should incorporate bright colours that create a high contrast, as these have been identified as the most effective for the client's vision loss
• Should be designed for hands-free use, as the client has expressed difficulty in carrying assistive devices and objects around with her

Constraints:

• The product will provide a means to protect the user from potential hazards, offering a layer of security during regular tasks
• The product will be designed to fit a range of different items or needs, making it flexible for various situations
• The product will be easy to use and integrate into everyday routines, requiring minimal effort for activation or adjustment

Initial Morph Chart

Summary

We addressed Kimberly's challenges with knife handling, which stemmed from her vision and hearing impairments, by designing an adjustable knife blade guard that enhances both safety and independence in the kitchen. Kimberly expressed difficulty in using knives due to her vision loss, which made her fearful of accidental cuts. Our design features a 3D-printed plastic sheath that securely covers the blade when not in use and doubles as a hand guard while cutting, effectively protecting her fingers. To ensure ease of use, we incorporated bright colour contrasts, making the guard more visible to her, and used Velcro and a ball chain for simple attachment and removal. The final product enables Kimberly to safely and independently cut ingredients, solving her previous struggles with knife use and allowing her to cook with more confidence and freedom.

Engineering Drawing for Knife Guard

Decision Matrix Between Initial Ideas

Team’s Work and Personal Contributions

Engineering Drawing for Adjustable Strap

Cost Matrix

Initial Sketch

As a team:

• Explore various design concepts, ultimately focusing on the knife guard as the most effective solution
• Brainstormed and refined the design to make sure the project met objectives and constraints
• Worked together on conducting tests for durability, water resistance, and ease of use
• Integrated user feedback from Kimberly into the design improvements
• Participated in evaluating the cost-effectiveness of materials and the overall design to stay within budget

Individually:

• Assisted with creating some of the CAD designs for the knife guard, contributing to the initial and final prototypes
• Monitored and oversaw the 3D printing process, ensuring prints were successful and adjusting settings if necessary
• Contributed to refining ideas during brainstorming and design iterations, providing input on functionality and practicality
• Helped with evaluating different materials for durability and water resistance
• Assisted in testing and providing feedback on prototypes to ensure the final design met the client’s needs

Reflection