You'll get access to over 3,000 product manager interview questions and answers
Recommended by over 100k members
My methodology for answering this product design question:
To clarify, we want to design a:
Washing Machine for Google. A smart washing machine which can be operated via a mobile app connecting it through Wi-Fi.
User Groups:Millennials: young adults who are versed to technology and live alone or recently married, want to get the chores done in quickest way possible while multi tasking
Working Family: Families who have both spouse working 5 days a week and have a kid(s), get only weekends to do house chores
Visually Impaired: Individuals who prefer devices which can interact with them through voice commands
Old Age Couple: Old age couples who want simple ways to run washing machine using simple voice commands
Let us choose Millennials as they are the large group and would be more inclined towards buying smart devices
Pain Points of User group:1.Clothes get piled up easily as finding time to even start machine is a task
2.Clothes are very dirty as they are worn for long periods – sometimes clothes are dirty even after wash
3.They don’t have time to segregate clothes based on colors or fabrics – some clothes get destroyed after wash
4.Forget to take clothes from the dryer for days – clothes could stink
5.Too many options to choose from washing machine mode – starts using random options to wash
6.Over-use of detergent – runs out of detergent quickly
Prioritizing User- needs:
# | User Needs | Impact to user | Comments |
1 | Finding time to start the machine
| High | Users have the habit of multi-tasking which leads to them procrastinating of washing clothes |
2 | Clothes remain dirty | High | User might go through entire process of cleaning the clothes |
3 | Segregation of clothes | High | User can ruin some of his/her expensive clothes |
4 | Taking clothes from dryer | Medium | As long as they are clean shouldn’t impact the user much |
5 | Too many washing machine options | High | Selecting the wrong options might not clean the clothes the way it should. Also too many options could be overwhelming |
6 | Overuse of detergent | Small | Could leave a smell of detergent, or user can run out of detergent but not that impactful |
Based on above prioritization comments 1,2,3,5 can chosen as the main user needs. 2,3 can be combined to one solution.
Solutions:Technology used:
AI: Learning about users washing habits
Auto sensors: To identify three things in clothes: the level of dirt, color and fabric
Machines design: The machine can have three sections:
1.Where load is kept.
2.Where the machine picks the clothes from load through sensors
3.Dryer
# | Solutions | Details | Impact on Users | Usage | Costs | Impact on Business |
1 | Send reminder notifications | Machine can send reminder notifications to app on when to wash clothes based on Users Google calendar. | M | M | M | M |
2 | Auto wash clothes by learning user’s habits
| Machine can learn the users washing habits and start machine on its own. | M | M | M | M |
3 | Voices commands to use machine
| User can command machine to start the progress by saying “Start washing” and answer the follow up questions from machine while working on laptop or cooking. The machine can also suggest user different modes based on the learning of the other users of similar age group | H | H | H | H |
4 | Using app for setting the time of wash | User can start the machine through app on its way home, so the clothes are ready by the time they reach home | L | L | M | L |
5 | Use sensors to identify whites from color, delicate fabrics from normal fabrics, very dirty clothes from normal dirty clothes | The machine can segregate the clothes and wash them accordingly in sequence. Segregate whites from load – Wash – Move to dryer - Give report Segregate normal fabric – Wash – Move to dryer - Give report Segregate delicate fabric – Wash – Move to dryer - Give report Segregate very dirty clothes – Wash – Move to dryer - Give report | H | H | H | H |
To summarize, we want to build smart Washing Machine for Google which can interact with users through voice commands and make the washing process easy and smooth without much efforts from users. We can include features 3 and 5 in our MVP.
Open Questions/Assumptions:
1. What is the objective? Better user experience, Quick, less user interaction to get the washing/drying done etc.
2. Assuming it is a clothes washing machine
3. What kind of clothes one would wash>
4. What is the frequency like
5. Try to understand the pattern: Wash clothes, put them for dry and what other experience do we create for users
6. is it a free machine or needs credits
Goal/Objective: Assuming the goal is to ensure less distraction for employees from work, by taking care of one more errand for their employees.
User personas:
People working at Google who may be interested in using Washing machine can be categorized as follows -
1. Young kids, newlyweds, parents staying at a place who do not have an inbuilt washing machine (~30%)
2. Single parents who may lack time to do chores at home (25%)
3. Disabled (less than 5%)
4. Others
**Because they work at a tech company the assumption is that the above users will be tech savy. Mostly going to focus on 1 and 2.
Problems and solutions
P1: Automated notifications when Washing is done, drying is done
P2: Not having to track, fill and bother about the washing liquid, fabric dryer, fabric softner etc
P3: Not having to physically move clothes from washer to dryer to steam iron(maybe). or deliver to the existing ironing service
P4: Not having to decide type of load, type of fabric, and kind of water to use to complete the wash.
P5: Not having to sort clothes.
Since users are tech savy, users can check-in and load all their clothes. The washing machine will use an AI based solution to separate and sort clothes that can be washed together and accordingly, recommends the wash mechanism(solves p4 and P5).
Once the clothes are washed, they are scheduled to be dried ensuring that drying completes before the users pick up time. (solves for P1)
Notify staff or the Google's service team to refill orders for fabric softners, washing liquid etc(solves for p2)
Either have a washer/dryer in one or have automation to move clothes to the dryer and then bucket them for pick up by either ironing service or the user. (solves for p3)
Efforts
1 | AI based solution to separate and sort clothes that can be washed together and accordingly recommends the wash mechanism | High | High |
2 | Scheduling of tasks like sorting, washing, drying | Medium | Medium |
3 | Notifications for users and the staff | Low | High |
4 | Track refills | Medium | High |
5 | Using one washer dryer | Low | Medium |
6 | To have separate washer dryer and have automation to move clothes to dryer such that all the clothes are scheduled to complete drying before the pick up time. | High | Medium |
Based on above 1, 2, 3, 4, 5 should be prioritized create an experience for the user.
Success metrics:
Unique users
New users
Repeat users
The above success metrics can be measured by giving credit to Google employees card that logs time, amount swipes etc, to get their usage pattern.
Also, retention metrics can go up if the user experience is better. Having a way to get user feedback through their phone app will help understand user perspective towards the experience of this product.
Clarification:
- What is the Business objective for google to launch this? Ans: Revenue
- Which Country are we plannin to launch this? USA
- Is there any product objective apart from washing clothes? Upto you
User:
Overall the market is seen to be segmented like this that influences purchases of innovative tech products
- Convenience Seekers family (Typically 30-45 Yrs with/witout kids and both working)
- Image Seekers (Believe in iconic purchases, First in category purchases)
- Family first (30-45 Yrs, Husband working and wife a home-maker with 2 kids)
- Pragramtic and conventional (45+)
We will focus on convenience seekers as that is a sizable segment and that is inclined to purchase innovative products. Not focussing on image seeker because of small size.
Needs/Pain Points:
- Have less time to manage household chores including entire process of washing, drying and ironing as they stay out of house most of the time
- Want to save energy corresposning to washing
- Forget to do clean clothes
- Need less effort to manage washing process
- Units sold and CAGR
- Revenue and CAGR
- Number of operation through APP
- Profit and CAGR
- Complaints trend
- Distribution and CAGR
- APP download
- APP registration
Interviewer: Generald marketplace.
Me: Ok. As a PM, what has been helping is to think about the business goal or leadership vision/direction which helps me think through customer type. Once I know that, it becomes easier to think about what their main concers might be so that I can the think through would help satisfy their needs. Can we take similar approach?
Int: Sure.
Me: Is there a competitor product currently that isn't solving the needs or has major issues that we are trying to amend with our product? Or is this a brand new product?
Int: Upto you.
Me: Let's assume wasghing machines aren't any new for the world but we want to thinkoutside the box, like a Tesla for the world. Considering, this is a new venture, to stay afloat company needs customers. So let's focus on features that would attract new customers.
Int: Ok.
Me: Washing machines are used by three diff type of customers: 1) teenagers who are new to having to do their laundery 2) Elderly who may have memory issues 3)Normal healthy adults.
Let's focus on #1 since if we are to think out of the box, it's this group that can be easily swayed and it would also be an easier way for parents to get their kids to want to do their laundry. Well, at least me, having grown up in India, I know I never wanted to do my laundry and I am going to assume that's a prob most teenagers might have?
Int: Ok ....let's see if we can do this in the next 10 min. We are short of time.
Me: I think teenagers who are new to laundry may face few problems 1)Don't know how to wash different type of clothes to make sure they don't spoil it 2)Forgets clothes is in washer because of being absent minded / getting busy with other things, etc.
I could think of more problem but in the interest of time can't think of anything else right now. Let's focus on #1 since that's going to majority of time and focusing on #2 may not result in differentiating factor for marketplace.
Int: Ok
Me: I will rate Feasibility, Complexity and Value Add to Customer as I go along. For F and C there is definitely many factors such as tech and resource (time/money/manpower) to consider but let's not break it down to that level for now.
Solution:
1a. User can use camera in the machine to take a snap of the clothes and confirm the fabric understood by the machine. This can be done anytime a new garment is bought. This can be used towards recommendation engine. (F4 C2 V5)
1b. Machine's vision system auto identifies what clothes were loaded, user can confirm it and machine learns it overtime using various factors (what vision system sees vs what corrections user made, weight, etc.). Based on identification, machine will auto recommend settings to choose for washing clothes (amount of detergent to use, time to set, spin cycle, level of warmth of water, etc.). (F3 C3 V5)
1c. User can rate quality of wash and machine can have a community of users who also have rated. Based on ratings, machine can recommend the user something like "most have used x settings for washing the type of clothes you are loading and have obtained x quality which is better than what you have experienced." (F2 C4 V3)
Considering speed to market is important and 1a is needed to do 1b, let's do 1a and then 1b. 1c is great but is nice to have so we can push that to Release 2. Also, 1a and 1b are features that will differentiate in the marketplace for the most part and 1c is more complex. So let's release 1a and 1b first. There is a caveat with these features though even though AI and Vision technology is quite matrue. Vision may inaccurately recognize clothes and may damage the fabric. If that happens, there is possibility of law suites especially if these machines were used by corporate. Also, for 1c, users don't always put the same type of load so it might be difficult to specifically identify better setting based on community. This may even be not feasible.
If we release this machine, I would recommend measuring 1) # of new customers acquired per quarter 2)# of feature usage per 1000 customers.
All in all, providing technology heavy features is a key to attract young teenage customers. Also, I may be different since i was born in India and kids that young in India don't wash kids but my parents wanted me to and it was really hard for my parents to get me to do it. So these features may attract kids to want to do it and parents will hence buy. Parents are the real customers here in a way since they are the key to monetization. So let's go with 1a and 1b.
Business Objectives
C: Place of use – home, school, hotel, public use?
I: Home
C: Any specific geography to consider?
I: Consider India
C: Any specific business goal to consider
I: To improve customer experience
User groups
The following are the user groups for use of washing machine by Google:
1. Family
2. Millennials
Out of these options, I want to focus on point no 2- Millennials user group. This group users are tech savvy and influenced by social media and reviews online.
S. No. | User Need | Importance of the user |
1. | Save time | 5 |
2. | Cost effective | 1 |
3. | Automated ironing of clothes | 2 |
4. | Automatic cleaning mode according to clothes type | 3 |
5. | Not to worry about water residue, dust etc | 6 |
6. | Connect washing machine with phone | 4 |
Solutions
Out of these, I want to focus on points from 3,4 and 6 as they are AI powered and will provide effective ways in using washing machine.
Google Washing Machine is a new product that has features like automatic ironing, drying of clothes, automatic mode selection according to clothes types, connecting washing machine to phone app.
S. No. | User Need | Solutions | Implementation Costs | Impact to the user |
1. | Automated ironing of clothes | A compartment in washing machine where simply clothes can be hanged and simple click button to start. Clothes can be ironed using steam and heat.
| High: as new featured is added | High |
Add scent option to add fragrance while clothes are ironing
| Low: as it is an optional feature | Low | ||
2. | Automatic cleaning mode according to clothes type | Special sensors to measure cloth load | Medium: adding special sensors | High |
Auto-detect cleaning mode according to the type of clothes and based on clothes type washing mode is decided
| High: use of AI for auto-detect features | High | ||
3. | Connect washing machine with phone | In-built Wi-Fi to connect washing machine to the phone app to give actions like start, stop machine, view remaining % of time
| Medium: built-in Wi-Fi | Medium |
Metrices used to measure success
1. Number of apps download
2. Increase in sales and revenues
Top Google interview questions
- What is your favorite product? Why?89 answers | 263k views
- How would you design a bicycle renting app for tourists?62 answers | 82.5k views
- Build a product to buy and sell antiques.54 answers | 66.8k views
- See Google PM Interview Questions
Top Product Design interview questions
- How would you design a web search engine for children below 14 years old?36 answers | 42.9k views
- Design a library for the future.25 answers | 23.5k views
- How would you design a consumer application for a scooter sharing business?21 answers | 18.6k views
- See Product Design PM Interview Questions
Top Google interview questions
- How would you improve Google Maps?53 answers | 228k views
- A metric for a video streaming service dropped by 80%. What do you do?50 answers | 135k views
- Calculate the number of queries answered by Google per second.45 answers | 78.5k views
- See Google PM Interview Questions
Top Product Design interview questions
- Build a product to solve the dog poop problem.13 answers | 9.4k views
- How would you design a "Google Refrigerator"?13 answers | 8.3k views
- Design a social travel product.12 answers | 13.4k views
- See Product Design PM Interview Questions