Week 7: Bill of Materials (BOM), Standard Operating Procedures (SOP)

"The function of design is letting design function." -Micha Commeren

Week 7 Summary

For Week 7 of the HPS program, the participants learned about how a Bill of Materials (BOM) is created and the purposes of it are highlighted. It became apparent that the teams which reference the BOM for product information rely on it heavily for accurate information about price and availability. Another part of the design process which was brought up was the Standard Operating Procedures (SOP) which, in fundamental terms, is a set of instructions on how to assemble the consumer electronic products. In essence, most of the SOP was composed of pictures showing incremental stages of assembly. Along with these two design process steps, HPS participants were also advised to make yet another revision to the parts based upon the quote given by Protolabs.

Bill of Materials (BOM)

The bill of materials is extremely important when it comes to figuring out what parts go with what subassembly and where to purchase each product. In some cases, the price based upon the bill of materials is given. There are some blank spots when it comes to certain areas, but for the most part, this gives a way to change the product and communicate that change quickly. The link to my most recent bill of materials is here.

This is for the Standard Operating Procedure(SOP)

A standard has already been set for the way the new versions of parts will be presented, so I just want to keep things more consistent and have as little change as possible.

Standard Operating Procedure of Noisemaker

Step 1

Take the bottom case and orient it as shown in the photograph. Make sure to tap the screw holes in the rear where marked.

Step 2

Turn the bottom case around and insert the machine screws into the part as shown.

Step 3

Flip the bottom case around once more, keeping the machine screws inserted. Secure the machine screws with hex nuts.

Step 4

Get the Raspberry PI and orient the printed circuit board (PCB) as shown.

Step 5

Grab the voice bonnet and attach it to the Raspberry PI using the prongs on the PCB.

Step 6

Insert the Raspberry PI and voice bonnet configuration into the bottom case as shown below, and make sure the fit is tight.

Step 7

Grab the upper case part and orient as shown.

Step 8

Take the speaker and four machine screws, and flip the upper case upside down. Tap the marked screw holes (all four), and then align the speaker and secure with the machine screws.

Step 9

Take the front cover and orient it as shown, and tap the screw holes on the top and the bottom.

Step 10

Take the 24 mm button and remove the plastic hex attachment. Insert the 24 mm button as shown, and secure with the plastic hex ring.

Step 11

Grab the upper case subassembly and the front cover with the attached button. Use two machine screws and secure the upper case subassembly to the front cover as shown.

Step 12

Take the bottom case subassembly and attach it to the aforementioned parts as shown.

Step 13

(Not pictured) Attach the wires from the speaker to the PCB as instructed, and use the given wires to attach the speaker to the PCB setup.

Step 14

Take the circuit cover and two machine screws. Attach the circuit cover and align the holes of the cover to the holes of the bottom case. Insert the screws as shown.

Step 15

Take the back cover and tap all six screw holes before use. Next, take two machine screws and attach the back cover using the screws coming in from the front cover.

Step 16

Take two more machine screws and insert them through the upper case and into where the back cover would be.

Step 17

Assembly complete! Enjoy your noisemaker.

Protolabs Quote

Last week, each HPS student was required to send their parts to Protolabs to receive a quote, and the quote would inform the user about where to fix their parts to make them able to be manufactured using the selected procedure. Below are the recommendations from Protolabs to make my parts injection-mold ready.

Google HPS Product Representation

All of what is depicted is representative of the work one would expect from the Google Hardware Product Sprint Program. All educational content depicted belongs to Google.

Made with CSS and HTML5.

Copyright 2021. All rights reserved.