Feasibility Question: How much flour can be made from one breadfruit? Assume: Breadfruit is 70% water by weight, peel and core weigh approximately 0.2lb, shreds are completely dry (100% water reduction) Analysis: 3 breadfruit = $10.00 1 breadfruit = $1.98 Therefore: 1 breadfruit = 1.67lb 1.67lb * 0.7 = 0.5lb of dried fruit 0.5lb – 0.2lb = 0.3lb One breadfruit yields approximately 0.3lb of flour.
HOQ This format only allows 25 ER’s...we will need to reformat or eliminate some ER’s to make a complete HOQ.
Functional Decomposition Critical!
Benchmarking for Functions-Shred Ribbon Fry Cutter http://images.zesco.com/pimages/518/518-d-039.jpg Apple Peeler http://ecx.images-amazon.com/images/I/7185U2IiWPL._SL1500_.jpg
Benchmarking for Functions-Shred Apple Peeler with Cutter http://en.wikipedia.org/wiki/Cam#mediaviewer/File:Nockenwelle_ani.gif http://tclauset.org/16_StGuides/ch13/picts/applepeeler.jpg
Benchmarking to Function - Grind Roll Crushers http://www.scribd.com/doc/30156582/Chapter-6
Benchmarking Functions - Grinder Mortar and Pestle http://i.ebayimg.com/00/s/NjUwWDY1MA==/z/DNoAAOxygPtS5q4j/$_35.JPG Hammer Mill http://www.responsiblebusiness.eu/download/attachments/2588750/hammer+mill.jp g
Benchmarking Functions - Human Power Bike Power http://www.lowtechmagazine.com/2011/05/pedal-powered-farms-and-factories.html Hand Crank http://www.prestowind.com/store/image/39og3/Hand_Crank_Generators_-_Wind_Generators_- _Survival_and_Emergency_Products_Crank-a-Watt_TM_Deluxe.jpg
●Doesn’t use electricity ●Available in Haiti ●Easy to maintain/sharpen cutter ●Effort required to operate ●Easy to understand ●Within budget ●Peels and cores (bonus) Selection Criteria
Pugh Diagram Round 1
Feasibility Question: Will grinding rollers need to be replaced? Assume: Industrial rollers can be compared to style used by team, rollers used constantly for 3 months/year, Force from industrial motor > force generate from human power Analysis: Team goal: Product life of greater than 3 years. 2 Manufacturers contacted through phone. Rollers in mills must be replaced after several years in industrial applications Since our application will only have heavy usage for 3 months every year and with less force than used in industrial applications, it is safe to assume the rollers used in our design will not need to be replaced during the lifetime of the product.
Feasibility Question: Will the grinder used in Pat 2 be cost effective? Assume: Grinder type already exists, online specifications are accurate Analysis: Country living grain mill Material: high carbon steel burrs – should not need to be replaced Advantages: Will not gum up if shreds are too moist Adjustable coarseness Easier than stone grinders Disadvantages: Will not grind as fine as ceramic grinders Slow and tiring when done by hand ** not as heavily weighted Cost for new set of grinders: $91.47 Feasible: This is a feasible design, however, would be more costly than other options www.onlygrainmills.com/country-living-grain-mill/ www.einkorn.com/grinding-einkorn/
Feasibility Analysis ●How much force is required to grind dried breadfruit? ●Once a particle size is selected we can estimate the grind roller capacity and the force needed to crush the particles. https://html1-f.scribdassets.com/18nnuf2o1sjeg0m/images/3-9d3751ac00.png
Pugh Diagram Round 2
Pugh Diagram Round 3
Architecture Team 1: Apple peeler with trimming mechanism and grinding rollers Haitian farmers Shredder MSD team Container Haitian farmers Grinder Container Quality test Hand crank Overall machine structure
Architecture Haitian farmers Shredder MSD team Container Haitian farmers Grinder Container Quality test Bike power Sam 2: Shredding rollers and Grinding rollers Overall machine structure
TRIZ ●Mechanical mortar and pestle http://www.retsch.com/uploads/sl/23747f6755854fd697495c7a8201dd93.jpg Benchmarking: ●Highly technical design ●Uses motors ●High quality (expensive) materials Quick Feasibility: ●Difficult to make tolerances needed ●Difficult to scale to larger size ●Materials most likely will not be available in Haiti ●Design would be robust and would need to be prototyped to determine if flour quality grain sizes are plausible.
Updated Project Plan
What could we learn from a trip to Haiti? ●Possible market value of our product ●Most/Least popular aspects about our design ●What type of environment our product will spend a majority of its life ●What materials are actually available in Haitian markets