choice.ReplacementUtility

Guide & worked example · Source

choice.ReplacementUtility(
    theta_maintenance=0.001,
    theta_replacement_cost=10.0,
    device=None,
)

Rust-style bus replacement flow utility.

Two-action specification:

• a=0 (maintain): u(x,0) = -theta_maintenance * x
• a=1 (replace): u(x,1) = -theta_replacement_cost

Attributes

Name	Description
device
theta_maintenance
theta_replacement_cost

Methods

Name	Description
forward	Evaluate replacement-model flow utility.
get_params	Return scalar utility parameters as a Python dictionary.
set_params	Set utility parameters from Python scalars or tensors.

forward

choice.ReplacementUtility.forward(
    state,
    choice=None,
    theta_maintenance=None,
    theta_replacement_cost=None,
)

Evaluate replacement-model flow utility.

Args: state: Discrete state index tensor. choice: Optional action index (0 maintain, 1 replace). theta_maintenance: Optional maintenance parameter override. theta_replacement_cost: Optional replacement-cost override.

Returns: Utility tensor for requested action or stacked (n_obs, 2) utility.

get_params

choice.ReplacementUtility.get_params()

Return scalar utility parameters as a Python dictionary.

set_params

choice.ReplacementUtility.set_params(theta_maintenance, theta_replacement_cost)

Set utility parameters from Python scalars or tensors.