# Add C3 and C4 phases

**URL:** <https://community.realtimelca.com/t/add-c3-and-c4-phases/336>\
**Category:** Features and Ideas\
**Created:** [July 11, 2025, 9:47am UTC](https://community.realtimelca.com/t/add-c3-and-c4-phases/336 "2025-07-11T09:47:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Lukas\_Hejl](https://avatars.discourse-cdn.com/v4/letter/l/ecae2f/32.png) [@Lukas\_Hejl](https://community.realtimelca.com/u/Lukas_Hejl)\
**Post date:** [July 11, 2025, 9:47am UTC](https://community.realtimelca.com/t/add-c3-and-c4-phases/336/1 "2025-07-11T09:47:53Z")

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When a material is misssing the C3 or C4 phase it is not possible to add it manually to the material. Which basically means the material is unuseful..

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**Author:** ![martinromby](https://dub1.discourse-cdn.com/flex005/user_avatar/community.realtimelca.com/martinromby/32/22_2.png) [@martinromby](https://community.realtimelca.com/u/martinromby)\
**Post date:** [July 11, 2025, 10:08am UTC](https://community.realtimelca.com/t/add-c3-and-c4-phases/336/2 "2025-07-11T10:08:16Z")

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Hi @Lukas_Hejl

Thanks for your request.  
It is always really good to hear feedback and ideas from our users.

As I see it there different ways to solve this.

1. Make it possible for users to duplicate materials into their own organisations, where the missing phases can be added. This ensure that the source data is intact and that this revised material can be used over and over again.
2. The user get an option to add the missing values in the mapping view process. This would then had to be done each time the user maps the material with the missing values.
3. Other ideas?

Looking forward to hearing back from you.

Br  
Martin

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**Author:** ![Lukas\_Hejl](https://avatars.discourse-cdn.com/v4/letter/l/ecae2f/32.png) [@Lukas\_Hejl](https://community.realtimelca.com/u/Lukas_Hejl)\
**Post date:** [July 14, 2025, 9:05am UTC](https://community.realtimelca.com/t/add-c3-and-c4-phases/336/3 "2025-07-14T09:05:55Z")

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Hej Martin. Beskeden bliver lige på dansk😄

Jeg vedhæfter lige et udklip fra BR18, vejledning til klimapåvirkning.

 ![image](https://europe1.discourse-cdn.com/flex005/uploads/realtimelca/original/1X/459975559901370395f80992520e522c707c5c2c.png)

1. I teorien burde man gå alle uploadede EPD’er med manglende C3 og C4 moduler igennem og tilføje de generiske værdier som passer bedst til produktet, men det er et kæmpe arbejde for jer..😅

2. Som jeg ser det hvis man vælger at duplikere et materiale så vil du ende med at have mange duplikerede materialer hvor du reelt set kun kan bruge én af dem og så ender man med et meget stort og tungt bibliotek.

Hvis det ikke bliver “min” løsning 1 så tænker jeg følgende vil være den nemmeste mulighed:  
Når man har mapped et materiale og den giver fejlen “missing C3 phase”. Så skal der være en mulighed for at kunne trykke “add C3/C4 phase” og så kan man selv vælge fra tabel 7 fra BR18. Lidt samme princip som når man skal vælge levetid, at du selv vælger for materialet og du kan vælge fra et skema.

Håber ovenstående giver mening👍