EXperimental Design 16.621
Experimental Design 16.621
Elements of Designing an Experiment Goal is to assess your hypothesis The main thing is to keep the main thing the main thing-Tom Curran, AFRL] The design goal for your experiment is to achieve your objective and satisfy your success criteria Your hos are the touchstones for your experimental design
Elements of Designing an Experiment • Goal is to assess your hypothesis – The main thing is to keep the main thing the main thing - [Tom Curran, AFRL] • The design goal for your experiment is to achieve your objective and satisfy your success criteria. • Your HOS are the touchstones for your experimental design
SOME FRAMING QUESTIONS Once the Hos is set we need to define in depth the path to get there Need to think through the whole process on an end-to-end basis Need to identify the hard parts Need to identify the key milestones(" mid term exams) This will include(at some level)questions such as What will we do? Why will we do it? Where will we do it? Who will help us? How will we do it? How well do we have to do it? When will we do it?
SOME FRAMING QUESTIONS • Once the HOS is set we need to define in depth the path to get there • Need to think through the whole process on an end-to-end basis • Need to identify the hard parts • Need to identify the key milestones (“mid term exams”) • This will include (at some level) questions such as: - What will we do? - Why will we do it? - Where will we do it? - Who will help us? - How will we do i t ? - How well do we have to do it? - When will we do it?
Project Specific applications of these Questions What is the best overall approach to achieve my objective? e.g., should I test children's car seats in the lab or in actual airplane environment? What are my choices of facilities? e.g., should I use a water tunnel or a wind tunnel to determine the performance of a split-tip keel? How will I measure my independent variables? e.g., Should I measure rotational speed of my airspeed indicator with a stroboscope or a shaft encoder?
Project Specific Applications of these Questions • What is the best overall approach to achieve my objective? – e.g., should I test children’s car seats in the lab or in actual airplane environment? • What are my choices of facilities? – e.g., should I use a water tunnel or a wind tunnel to determine the performance of a split-tip keel? • How will I measure my independent variables? – e.g., Should I measure rotational speed of my airspeed indicator with a stroboscope or a shaft encoder?
Observations about design Design is an inductive process Ways to learn design Study past designs that have been successful and extract patterns Look at the online models Work with a master designer Involve your advisor Do it yourself and receive feedback Basically this is the 16.621 process
Observations About Design • Design is an inductive process. • Ways to learn design – Study past designs that have been successful and extract patterns • Look at the online models – Work with a “master” designer • Involve your advisor – Do it yourself and receive feedback • Basically this is the 16.621 process