Post on 15-Jan-2016
Design methodologybasic ideas, aims, role, procedures
Design – what is this?Design – formulating a plan, a scheme or a method to translate a need into a satisfactorily functioning device that satisfies the need
Konstruowanie - projektowanie szczegółowe - dobieranie cech konstrukcyjnych, materiałowych, geometrycznych, dynamicznych projektowanej maszyny jej zespołów i podzespołów i elementów
Designing – what for?New products being developped (life-cycle of a product) direct order but more often planning Planning of product development
External impulses (incentives):law regulationsmarketeconomic policynew technology
And internal: within the firms
Importance of design process
What is defined in the design process? ........
... EVERYTHINGCost of design process is .......
... Small (almost negligible)
Importance of design process... but, interestingly…
Change in design methods
Conventional design process - linear, sequential „over the wall”
Change in design methods
„concurrent engineering”
Phases of design procedure
Problem formulating - precyzowanie zadaniaIt should be a designers’ task – why?
List of specifications – there are WISHES and REQUIREMENTS
hints : what is the problem?what are the wishes and expectations?are conditions realistic?
Problem solving:
•Formulate a problem,
•Define criteria,
•Seek solutions,
•evaluate/select,
•Carry out
Requirements
Requirements – cotradictions
Requirements
Requirements of the customers
General requirements• Functionality – ability to fulfil the function
• Durability and reliability -Durability – period of time in which a machine will perform its function (with necessary breaks for maintenance). Reliability is probability that a device will perform its function without a failure for a given period of time•Cheap and available materials•Easy and inexpensive manufacturing and assembly• Easy and safe operation •Inexpensive operation i small energy consumption•Small weight •Compact structure•Following the standards
Phases of design
• identification of important problems• creation• evaluation• decision
Phases of design process• identification of important problems • creation -
- analysis and dividing into sub functions- seeking solutions fulfiling sub-functions- combining sub functions to obtain solutions fulfilling function- choice of useful combinations- defining variants of solutions
Phases of design procedure
• preliminary calculations, sketches of variants (versions), study
Aids in creation:•heuristic methods (?)
EUREKA•literature•Analysis of natural systems •Analysis of other systems•Analogies
Inversion
Evaluation
•criteria
•Weighted marks
Evaluation
•criteria
•Simplified binary evaluation