Article just released, not sure on all the sources, on Russia's existing and future military situation:
Russian forces are likely to peak in late 2024, with increasing material challenges over the course of 2025.
www.rusi.org
Key points:
-Kremlin projects victory needs to be/can be achieved by 2026 within their current planning for manpower mobilisation and industry output, without having to go to a full war mobilisation.
-Russian air force highly constrained by availability of trained let alone experienced pilots.
-Expect to be able to produce approx. 1500 tanks a year until 2026 via ~20% new and 80% refurbished from stored war stock.
-Has somewhat stabilised semi-conductor supplies but only by extensive investment in trying to expand on them which has failed.
-Required to manufacture ~5.6 million artillery shells over 2024 to be able to continue it aspirations in Ukraine in 2025, projected to only be able to produce about half of that with an expected lead-time of 5 years to setup new factories and material processing to accomplish that level of production. (5 years is likely not a hard limit and could be much quicker with civilian and industry mobilisation for the war effort).
-Has approx. 3 million rounds of artillery ammo left in storage, likely poor condition however, NK can provide around 2 million rounds.
-Russian prospects are declining, but it will depend on foreign support as to if Ukraine can out weather Russia to a point where the only option for both sides is to negotiate with Ukraine having the stronger hand, but that assumes Russia continues, or is limited to, the current trajectory of manpower, civil and industrial mobilisation towards the war effort.
EDIT:
The Russian aim for victory by 2026:
Surrender terms currently being proposed by Russian intermediaries include Ukraine ceding the territory already under Russian control along with Kharkiv, and in some versions Odessa; agreeing not to join NATO; and maintaining a head of state approved by Russia. The only significant concession Russia proposes is that what is left of Ukraine can join the EU.
i.e. forcing capitulation of the entire country by establishing a geographic stranglehold and a head of state who can basically hand the rest of the country over to Russia.