3. Problem definition - O-Division-2020-2021-Even/Repo-4 GitHub Wiki

Need Statement:

The process of crushing and disposing the used cup has been a difficult task to the human kind. So, the need of the automatic cup crushing bot is required to reduce the work load as it can make it way easier.

3.1 Question and answer

Table 1: Questions and answers

SL.NO	QUESTION	ANSWER	OBJECTIVE/CONSTRAINT/FUNCTION
1.	Should the machine be automatic or manual?	The Machine should be Automatic	Objective
2.	Machine should be fixed or portable?	The Machine should be portable	Objective
3.	How many cups should your machine crush at a time?	1 Cup	Constraint
4.	How many cups should be crushed per minute?	At least 4 cups per minute	Constraint
5.	What should be the maximum weight of the Machine?	It is better if the machine is as light as possible, around 2 kgs would be perfect	Constraint
6.	What should be Size of Machine	Dimension: 1.5ft X 1.5ft X 2ft	Constraint
7.	Which kind of cups should your machine crush?	Plastic and paper cups	Objective
8.	What should be the size of the cup used?	Usually they'll be 50-100 ml cups	Constraint
9.	What should be the time taken to crush the cups?	Within 10 to 20 seconds	Constraint
10.	Should the Machine be user friendly?	Yes	Objective
11.	How much Machine can cost?	Try to make it within Rs.4000	Constaint
12.	Do you want to add up any more feature?	It should store the crushed cups in a Dustbin	Function
13.	Does the machine should indicate you after the completion of its work?	Yes, if you make it available then it's good	Function

3.2 Basic Survey and requirements

Table 2: Observation from a literature survey

SL.NO	OBSERVATION FROM SURVEY	REQUIREMENTS
1.	Size of the machine	It should be 1.5 * 1.5 * 2 cubic feet.
2.	Interface of the machine	It should be user-friendly and hygienic.
3.	Weight of the machine	It should be under 2 Kg.
4.	No of cups to be crushed	It should crush at least 4 cups per minute.
5.	Materials to be used	Materials used to build, must be non-toxic and lightweight.
6.	No. of hours the machine should work per day	It should work for more than 3 hours per day.
7.	The next procedure after crushing	The product should be moved to the collecting box.

3.3 Identifying Client's Objectives

Step 1: Prepare a list of design objectives

Table 3: Objectives identified

SI.No	Objectives
1.	Machine should be Semi-automatic
2.	Machine should be light weighted and portable
3.	Machine should be User-friendly
4.	Machine should be clean and hygienic

Problem definition version 3.1 :

Design an automatic cup crusher machine that crushes plastic/paper cups. It should be user-friendly and hygienic. It should be portable & lightweight. Materials used to build it must be non-toxic.

3.4 Identify constraints

Step 1: Prepare a list of design constraints

Table 4: Identified Constraints

SI.No	Constraints
1.	Machine should be about only 2kgs.
2.	Dimensions of Machine about 5 cubic feet.
3.	Machine should crush at least 4 cups per minute.
4.	50-100ml cups should be crushed.
5.	Machine should crush 1 cup at a time.
6.	The machine should work for 3 hrs continuously.
7.	Machine should be durable.
8.	It must be made up of nontoxic material.
9.	Cost of the machine should be within Rs.4000.

Problem definition version 3.2 :

Design an automatic cup crusher machine that crushes plastic/paper cups. It should be user friendly & hygienic. The weight of the machine should be about only 2kgs. Dimensions of Machine about 5 cubic feet. It should crush 50-100ml cups & at a rate of about at least 4 cups per minute. It should crush 1 cup at a time. It should work for 3hrs continuously. It should be durable and must be made up of nontoxic material. It should be cost-effective and should cost under Rs.4000.

3.5 Establish Functions

Step 1: Prepare a list of design Functions

Table 5: Identified Functions

SI.No	Functions
1.	Crush the Cups.
2.	Collect the crushed cup into Bin.
3.	Indicate that the process has been completed by the machine to the user.

Problem definition version 3.3 :

Design an Automatic Cup-Crushing machine that aims to be user friendly, hygienic and safe to use. It should capable of crushing paper & plastic cups. It should be portable (Easy to lift and move) & weight of about 2kgs. Its price should not be more than RS. 4000 and should not occupy more space than 5 cubic feet. It should be durable and must be made up of nontoxic material. The machine should crush one cup at a time & should work for 3hrs continuously. It should crush atleast 4 cups per min. It should be capable of sensing the cup, should be capable of indicating completion of crushing operation, and should send the crushed cup to the bin.