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Professional development/Project management/Purchasing Guide (view source)
Revision as of 03:23, 21 December 2021
, 03:23, 21 December 2021no edit summary
== Building a bill of materials (BOM) ==
==Building a bill of materials (BOM)==
Your project BOM will include all components necessary to build your <u>final</u> product. You won't be able to do this properly without a good detailed design so that you don't miss any parts. Based on that list you will be able to tally your total product cost.
Your project BOM will include all components necessary to build your <u>final</u> product. You won't be able to do this properly without a good detailed design so that you don't miss any items. Imagine someone else is tasked with rebuilding your product, they need to be able to do so with whatever is specified in the BOM. Based on that list you will be able to tally your total product cost.
=== Bill of materials ===
===Bill of materials===
The most efficient way of compiling your BOM is in a tabular format. Here are the columns that should be included with a few examples of items:
The most efficient way of compiling your BOM is in a tabular format. Here are the columns that should be included with a few examples of items:
{| class="wikitable"
{| class="wikitable"
!Units of measure
!Units of measure
!Quantity
!Quantity
!Cost per unit
!Total cost
!Link
|-
|-
|
|Screw
|
|M3 x 8mm
|
|Unit
|
|4
|0.1$
|0.4$
|https://edu-makerlab2021.odoo.com/shop/product/socket-head-screw-metric-70#attr=375,370
|-
|Wire (5 ft)
|22 awg, red
|Unit
|1
|2.5$
|2.5$
|https://edu-makerlab2021.odoo.com/shop/product/wire-5ft-45?search=wire#attr=213,217
|-
|-
|
|NewPing library
|
|For ultrasonic sensors
|
|Unit
|
|1
|0$
|0$
|https://www.arduino.cc/reference/en/libraries/newping/
|-
|-
|
| colspan="5" |'''Total product cost'''
|
|2.9$
|
|
|
|}
|}
There are things that you will often forget about when putting this list together, here are some tricks:
#Don't forget to add links to each item
#Don't forget to add links to each item
#Don't forget the shipping cost
#Don't forget the shipping cost
#Don't forget to include costs of 3D printing or laser cutting materials, estimates can be found from https://makerepo.com/print_orders/index_new
#Don't forget to include costs of 3D printing or laser cutting materials, estimates can be found from https://makerepo.com/print_orders/index_new
#Include ALL items, even if they are 0$
===List of equipment===
You may have other items that are necessary to test your different prototypes however. For example you may need a breadboard to test a prototype but that will not be included in the final product, the breadboard would then be included in your list of equipment but not your bill of materials.
==Spending your Project Budget==
==Spending your Project Budget==
#Before anything is bought by your team, a PM or TA must approve it.
#Before anything is bought by your team, a PM (project manager) or TA (teaching assistant) must approve it.
#When reviewing BOMs always check for:
#When reviewing BOMs always check for:
##Complete list of parts, this should be representative of the designs and include fasteners and wire and everything else.
##Complete list of parts, this should be representative of the designs and include fasteners and wire and everything else.