P17431: St. Joseph's House Shelter Improvements
/public/

Systems Re-Design

Table of Contents
MSD I & II MSD I MSD II

Home

Project Photos and Videos

Imagine RIT

Team Member Roles Definition

Meeting Minutes

Phase 1: Problem Definition

Phase 2: Systems Design

Phase 3: Preliminary Detailed Design

Phase 4: Detailed Design

Phase 1: Platform Lift Design

Phase 2: Systems Re-Design

Phase 3: Detailed Re-Design

Phase 4: Integrated System Build & Test

Phase 5: Customer Handoff & Final Project Documentation

Team Vision for Systems-Level Re-Design Phase

The work breakdown structure outlines the tasks that were to be completed in the systems re-design phase.

Relevant Documents

Revisiting Customer Needs

The updated set of customer requirements.

The updated set of customer requirements.

After the platform lift concept was closed, the team looked back at the customer requirements from the end of MSD I to see if there were any changes that needed to be made. At the end of MSD I, customer requirements SA8 and SA9 were added. After these new additions, no further changes were made for the customer requirements. The live document can be found here: updated requirements spreadsheet.

Revisiting Engineering Requirements

The updated set of engineering requirements.

The updated set of engineering requirements.

The engineering requirements were also reviewed to see if any changes needed to be made since MSD I. As the platform concept was no longer being pursued, engineering requirement number 19: "vertical distance from floor for overhead storage" was removed as the new concept to be pursued could not be attached to the ceiling. Also engineering requirement number 7 was updated with a new name of "Bed Bug Resistance" in order for the testing to be based of a checklist rating. A test plan was also added for this engineering requirement. The live document can be found here: updated requirements spreadsheet.

Updated House of Quality

The house of quality was updated in order to accommodate the changes made to the customer requirements and the engineering requirements.
The updated house of quality.

The updated house of quality.

Functional Decomposition

The functional decomposition remains unchanged and is shown below. The live document (Microsoft Visio in a .zip file) can be found here.
The functional decomposition that was created in MSD I.

The functional decomposition that was created in MSD I.

Morphological Chart & Brainstorming

After revisiting all the fundamental MSD I documents, the team came together and started to brainstorm using the Morphological method. We looked into different methods and locations to store the mattresses with the first floor. However, any concepts that we came up with could not utilize the ceiling. Below are the ideas that the team thought would best fit the current state.
Morphological chart of the new concepts generated during the team brainstorming session.

Morphological chart of the new concepts generated during the team brainstorming session.

Meeting at St. Joseph's

The team met with staff members from St. Joseph's to outline the concepts that had been generated and to solicit feedback and brainstorm new ideas with the staff. The minutes from that meeting can be found here.

Pugh's Method

After discussing with Sam, the cabinet concept and loft improvement concepts seemed to be the strongest ideas. In order to further evaluate what would be best to do, a Pugh's analysis was completed using the previous selection criteria.
Pugh's method for the new system concepts.

Pugh's method for the new system concepts.

Overall, we can see that the original cabinets came in first place and the fork lift mechanism came in second place. These two concepts were designed in more detail in order to understand the build and functionality of each one.

Basic Designs of Top Concepts

Pugh's Method revealed two clear front-runners for the new system design: the "forklift" concept and the "cabinet" concept. Basic designs for each were created to present to members at the St. Joseph's community meeting. A basic design for the storage carts was created so that community members could be updated on our progress in that area. The designs are described below.

Forklift Concept

The "forklift" concept originated from the team's concern that the space in the loft would go unused in many of the proposed concepts. In the forklift concept, two guide rails are mounted to a wall in the hospitality room, spanning the opening in the wall that previously housed the TV. A lift system travels up and down the guide rails, similar to the forks on a forklift. The mattresses will be stacked on wheeled carts in the hospitality room, then the carts will be wheeled onto the forks of the lift. The forks will then raise the cart to the level of the loft. In the forklift concept, the TV opening will be expanded so that a cart with a stack of seven mattresses will be able to pass through the enlarged opening. A staff member or guest will climb into the loft, and pull the cart off the forks. It will be wheeled to the side to make room for the next two carts. The forks will be lowered to floor level to pick up the next cart. To set the mattresses out at night, the process will be reversed. This animation illustrates the operation of the forklift concept (AVI format).

Cabinet Concept

The cabinet concept design is shown below.
Conceptual design for the mattress storage closets.

Conceptual design for the mattress storage closets.

Storage Cart Concept

The storage cart design is shown below.
Design for the personal belongings storage carts.

Design for the personal belongings storage carts.

St. Joseph's Community Meeting

The PowerPoint we presented at the community meeting can be found here.

Minutes from the meeting can be found here.

Plans for next phase

The team vision and tentative schedule for MSD II can be found here.