Need statement:

(Processing machine) We are trying to design a can compressing machine to compress waste and recycle.

4.1 Question and Answers

Sl.No	Questions	Answer	Objective/Function/Constraint
1.	What should the machine do?	Crush the used cans	Function
2.	How many cans can it hold?	3 cans	Constraint
3.	What should be the maximum weight of Machine?	Less than 2kgs	Constraint
4.	What should be the Size of Machine?	Dimensions :2ft X2ftX2ft	Constraint
5.	Should the machine be portable or fixed?	Portable	Objective
6.	Should the machine be user friendly?	Yes	Objective
7.	What other features are expected?	It should notify the user once process is completed	Function
8.	What is the cost of making single machine?	less than 5000	Constraint
9.	Maximum time the machine can work at a time?	3 hrs	Constraint
10	What are the key features?	Notify the user if machine is empty,overloaded and completion of process.	Function
11	What type of cans can the machine process	Aluminium	Constraint

4.2 Basic Survey and requirements

Sl.No	Observation from Surveys	Requirements
1	Weight of Machine	It should be easy to carry and transportable
2	Time of usage	The machine should work fine for at least 3 hours
3	Cost	Machine should be built within Rs.5000
4	No of can crushed	The machine should crush 3 cans in one minute
5	Materials to be used	Light weight materials

4.3 Identifying Client's Objectives

Sl.No	Objectives
01	Machine should be Semi-automatic
02	Machine should be portable
03	Machine should be cost effective
04	Machine should be User-friendly
05	Crushing should be done safely

Problem definition version 1.1 :-

Design a semi-automatic can compressing machine, which is able to do compress cans properly, it should be portable,user-friendly and cost effective where crushing is done with safety.

4.4 Identify constraints

Sl.No	Constraints
01	Machine should weigh less than 2 kg.
02	Dimensions 2 cubic ft
03	Machine should crush atleast 3 cans per minute.
04	Machine should crush one can at a time.
05	The machine should work for 3 HRS continuously.
06	Cost of the machine should be within Rs-5000

Problem definition version 1.2 :-

Design a semi-automatic can crushing machine, which is able to do accurate crushing process, it should be portable and user friendly ,where crushing is done with safety.Machine must not exceed the volume of 2 cubic feet , should be able to crush atleast 3 cans per minute and one can at a time, budget to build should not exceed Rs. 5000 and it should work for 3 hours continuously.

4.5 Establish Functions

Sl.No	Functions
01	Store the cans
02	Hold the cans.
03	Indicate that process has been completed to the user.
04	Detect the cans in storage unit.
05	Detect the cans in crushing unit.
06	Dispense the crushed cans.

Problem definition version 1.3 :-

Design a semi-automatic can crushing machine, which is able to do accurate crushing process, it should be portable and user-friendly ,where crushing is done with safety. Machine weight must not exceed 2kg and the volume of machine should not exceed 2 cubic feet, should be able to crush atleast 3 cans per minute and one can at a time, budget to build should not exceed Rs. 5000 and it should work for 3 hours continuously. Machine should be able to store and hold the cans. Machine should be able to detect the cans in storage and crushing unit. Machine should indicate the user after crushing process is completed and dispense the crushed cans.