P16488: Spirulina Production to Combat Malnutrition
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Subsystem Design

Table of Contents

Your website should document your journey through MSD, so include work-in-progress as well as latest results. Use pdf's for display whenever possible so that information is easily viewable without the need to download files and open applications. (Your EDGE file repository should still contain original editable files).

Content related to this node should go in the Detailed Design Documents directory unless you have made other arrangements with your guide ahead of time. From this point on to the end of MSD I, you will be making progress toward your detailed design. This page should contain snapshots of your progress toward a final detailed design, with the live documents and supporting information contained with the rest of your detailed design information.

All template text must be removed prior to your Subsystem-Level Design Review

Team Vision for Subsystem-Level Design Phase

Summarize:

Vision for Subsystems-Level Design Phase

Based on feedback from Phase II Review, the team updated the House of Quality, Systems Architecture, and Risks documents. Four subsystems were determined to be critical systems from our Systems Design phase. This was performed by splitting our Customer Requirements into three main points that our design should focus on: Minimizing Costs, Maximizing Production, and using Locally Available Resources with easy to train methods. A Venn diagram overlapping these points can be found below.
Concept Evaluation Venn Diagram

Concept Evaluation Venn Diagram

From group discussion relating our system functions to these three main points the following Subsystems chosen were:

Both Customer and Engineering requirements were mapped to each subsystem and can be found HERE. Feasibility analyses were performed for each Subsystem to gain further insight into the functionality of our chosen design from the Systems Design phase. During the Subsystems Level Design Phase the team set out to further understand our Subsystems through computational analyses. Each feasibility analysis was written in a report format for clarification and replication of each process. From each feasibility analysis Test Plans were created to justify our assumptions in our feasibility models and to further understand our design. Test Plans will coincide with both our Customer and Engineering Requirements and will lead us into the next design phase Preliminary Detailed Design.

CURRENT STATE

DESIRED STATE

PROJECT GOALS & DELIVERABLES

CONSTRAINTS

Below is the Subsystems Level Design Project Plan that was followed, as well as the plan for the Detailed Design Phase. You may find the complete Project Plan in a Microsoft Project file HERE.

Project Plan: Subsystems Level Design

Project Plan: Subsystems Level Design

Gantt Chart: Subsystems Level Design

Gantt Chart: Subsystems Level Design

Project Background

What is the Current Process?

public/Photo Gallery/CurrentProcess.JPG public/Photo Gallery/CurrentProcessImages.JPG

Updated System Functions

Purpose

Define the total list of functions and subfunctions, based on the Customer Requirements and Engineering Metrics, that must be delivered by the final design. Click HEREto access our Functional Decomposition document. Document Owner: Joey Majo.
Functional Decomposition: Subsystems Level Design

Functional Decomposition: Subsystems Level Design

Updated House of Quality

To access an updated copy of the House of Quality, click HERE.

House of Quality: Systems Level Design

House of Quality: Systems Level Design

House of Quality Part II:Subsystems Level Design

House of Quality Part II:Subsystems Level Design

Our Chosen Function

Final System Concept Function Solutions

Final System Concept Function Solutions

Final Sketch Design

Concept: Reduces the intensity of manual labor: Concrete Blocks, secchi disk, sun, well water, diffuser aeration system - PVC pipes, peat moss, Aluminet shadecloth, CMAM (cow manure), cheesecloth, mass scale, algae press

Concept: Reduces the intensity of manual labor: Concrete Blocks, secchi disk, sun, well water, diffuser aeration system - PVC pipes, peat moss, Aluminet shadecloth, CMAM (cow manure), cheesecloth, mass scale, algae press

Updated Systems Architecture

You may find the document for the Systems Architecture HERE. Document Owner: Dana Fisk

Systems Architecture: Subsystems Level Design

Systems Architecture: Subsystems Level Design

Feasibility: Prototyping, Analysis, Simulation

Between now and the end of the semester, your team will continue to add detail to your design, which will require more detailed analysis and prototyping to answer feasibility questions. Consider:

Purpose

  1. Confirm that the selected concepts can deliver functionality defined by the System Architecture.
  2. Define the optimal values of the most sensitive design parameters.
  3. Support the evaluation of your team's concepts with quantitative information.

Instructions

  1. Instructions and EXAMPLE must be deleted before the System-Level Design Review AND Identify an owner for this document.
  2. This document will be inspected at all project reviews during MSD1.
  3. At the system design level, feasibility analysis and prototyping will be relatively coarse. First order analysis, estimation, and rough physical mockups are to be expected.
  4. Select the concepts that are expected to be most sensitive and/or problematic. These are usually concepts that will not be satisfied by COTS components.
  5. Define the transfer function that converts the concept/subsystem inputs into the desired outputs as a function of specific design parameters. This can be done via theoretical analysis or empirical prototyping. it is often useful for two or more team members to work together so that the work is checked and a clear understanding of these models is captured. Get help here from SMEs who should be able to alert your team to potential difficulties and possible solutions.
  6. Use the models to quantitatively specify the design parameter targets and acceptable ranges.
  7. Confirm that the concepts selected and the designs anticipated will generate the desired performance.
  8. Considering the purpose, the team should anticipate potential failure modes associated with construction and use of this document.

Inputs and Source

  1. Engineering Requirements
  2. Concept Selection

Outputs and Destination

  1. A list of Design Parameters, Quantified Targets, and acceptable tolerances
  2. Sensitivity analysis
  3. Concept Selection

Drawings, Schematics, Flow Charts, etc.

Bill of Materials (BOM)

Begin building a BOM based on design work to this point.

Risk Assessment

Design Review Materials

Include links to:

Plans for next phase


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