Table A1

quotations from interviews and codes for data analyses

VariablesCodeQuotesCompany
Impact on upstream SCMake or buyMakeInitially we relied on an Italian service provider, as we did not yet have our own 3D printer. When we saw that the mechanical and hydraulic world reacted very well and with great interest to the first 3D printed components, we decided to make the leap and buy our first metal printerCompany A
BuyWe don't have in-house printers for the production of metal parts. This is because the technology today is capital intensive, requiring a large investmentCompany C
Make and buyUnfortunately, we are not able to afford sintering machines or stereolithography equipment, which are quite expensive investments […], so we have our own network of suppliersCompany E
Vertical IntegrationThere is a tendency to apply additive to new components instead of replacing existing ones. So, the company tends to buy the key suppliers of the technology (machinery and powders) and make them part of the same business'Company F
Centralized vs decentralizedCentralizedGeographically, there is only one production plant where all the printers are locatedCompany G
Decentralized--
Supply networkIncrease in number of suppliersNew suppliers are needed for the post-processing stages (e.g. dyeing). [ …] if you decide to bring the technology in-house, you should then have whoever supplies the material, the machine, the finishing … so in this case the number of suppliers increasesCompany J
Decrease in number of suppliers--
New suppliersEquipment and raw materials suppliersUnfortunately, we are not able to afford sintering machines or stereolithography equipment, which are quite expensive investments […], so we have our own network of suppliersCompany E
 AM-related service providersNew suppliers are needed for the post-processing stages (e.g. dyeing). [ …] if you decide to bring the technology in-house, you should then have whoever supplies the material, the machine, the finishing … so in this case the number of suppliers increasesCompany J
 Relationship with suppliersLong-term collaborationWe have created a sort of partnership with the suppliers [ …] they provide us with a series of information, that the powder is certified with practical tests, the fact that the machine has used certain parameters and that if tomorrow I want to do the same piece, I have to do it the same way. They gave us a lot of information, it is such a new topic that the more we share this information, the more we are able to achieve the common goalCompany H
 Lock-in effectWe started at the beginning using the raw material recommended by the manufacturer of the machine [ …] We tried then to purchase it on Amazon, which was much cheaper but with very different results. So, I have to say a very first impact on the SC was “Ok, let's go back to the supplier that has an agreement with the machine, which although more expensive, however, guarantees us not to have much waste”Company A

Source(s): Created by author

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