# Policy Graph in SDDP.jl package

**URL:** <https://discourse.julialang.org/t/policy-graph-in-sddp-jl-package/100062>\
**Category:** Optimization (Mathematical)\
**Tags:** question, optimization\
**Created:** [June 8, 2023, 4:26pm UTC](https://discourse.julialang.org/t/policy-graph-in-sddp-jl-package/100062 "2023-06-08T16:26:13Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![WalterMadelim](https://avatars.discourse-cdn.com/v4/letter/w/3e96dc/32.png) [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Post date:** [December 3, 2025, 4:19am UTC](https://discourse.julialang.org/t/policy-graph-in-sddp-jl-package/100062/3 "2025-12-03T04:19:48Z")

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> [@odow](#):
>
> Stagewise-independent is a misnomer. It really should be “nodewise-independent.”

Not fully agree. The notion of “stage” is more fundamental and intrinsic. The notion “node” embodies an implication/restriction—you are restricting the underlying true stochastic process to be a scenario tree.

Now I want to ask:

- is it possible to carry out a SDDP algorithm even if we do not pre-construct a finite scenario tree? (e.g. we only provide a sampler, will this be sufficient?)

One more question related: [Markovian SDDP: is a finite and concrete scenario tree necessary?](https://discourse.julialang.org/t/markovian-sddp-is-a-finite-and-concrete-scenario-tree-necessary/134317)

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