2. MODERN TOILETS
The modern toilet though innovative and efficient in getting rid of waste uses quite a lot water .
This in turn causes the following:
Increase in water bills
Misuse in investment put in cleaning/recycling
High cost of living
Due to the problems stated above, the group members were tasked with coming with a flush toilet concept that
reduces water consumption.
4. (problem is here)
water(material) mechanical (energy)
EMS MODEL WITH TRIZ COMPONENTS
LEVER HANDLE LEVER ARM
FLAPPER BOWL
TRAPWAY
SEWER
FILL TANK
FLOAT BALL
INLET
VALVE
5. CUSTOMER NEEDS
● According to the results of a questionnaire made by the group
members the following needs were found to be common
among a multitude of customers. They are; water efficiency,
cost, aesthetics and user friendliness.
● An AHP was drawn up by the team in order to weight and find
out the most immediate need to be met.
● The following was the order of importance according to the
AHP: water efficiency, convenience, cost, aesthetics.
6. EXTERNAL SEARCH
● An external search (patents) was conducted in order to find out
existing toilet designs that conserve water so as to come up
with new concepts or improve on already existing ones. An art-
function matrix was drawn.
7. IDR AND TECHNICAL CONTRADICTIONS
● IDR( IDEAL FINAL RESULT)
A resource that will eliminate use of excess water which leads to leads to misuse of resources
that are put in water recycling, within the toilet during flushing without complicating the system
while the toilet is getting rid of waste.
● TECHNICAL CONTRADICTIONS
Complexity of the design (36) verses productivity (39)
Productivity (39) verses water quantity (26)
Stress or pressure (11) verses quantity of water (26)
8. GENERAL SOLUTIONS FROM CONTADICTION
MATRICES
● From the technical contradictions deduced a contradiction matrix was drawn up. Using the TRIZ appendix
further helped the team members to base their concepts on the design principle solutions proposed by the
TRIZ appendix.
● DESIGN PRINCIPLES
3-Local quality 17-Moving into a new dimension 35-Altering an object’s aggregate state
10-Preliminary action 24-Go between 36-Use of phase changes
12-Equipotentiality 27-In-expensive short life 38-Using strong oxidation agents
13-Opposite action 28-Replacement of a mechanical pattern 39-Using an inert atmosphere
14-Spheroidality * 29-Hydraulic or pneumatic solutions
11. CONCEPT SELECTION
● We used the help of Pugh charts to obtain our final design from our three concepts.
Concept three was the best since it was the one with the highest total whenever it
was used. This was followed by concept two. And finally concept 1. We decided to
use concept 3 since it was the best.
