Fakat is a coordinating conjunction meaning “but.”
In Turkish predicative adjectives remain in their base form when describing a noun with a zero-copula. There’s no gender or plural agreement, and no additional case endings:
• Teslimat süreci uzun (“The delivery process is long”)
• Kitaplar ilginç (“The books are interesting”)
Yes, word order is fairly flexible:
• Uzun fakat düzenli bir teslimat süreci.
• Düzenli ama uzun bir teslimat süreci.
Adding bir (“a”) before teslimat makes it indefinite, while keeping bir out makes it a general statement. Just watch your adjective order to preserve emphasis.
They overlap but aren’t identical:
You pluralize süreç and attach the possessive suffix to it, like this:
Teslimat süreçleri uzun fakat düzenli.
Here süreçleri = süreç + plural -ler + 3rd-person possessive -i.