Crate dsfb_semiconductor 

dsfb-semiconductor — deterministic DSFB kernel and SECOM benchmark companion.

Non-Intrusion Guarantees

DSFB is a read-only supervisory system operating on residual streams.

Guarantee	Enforcement
No mutation of upstream data	Observer API accepts only &[f64] (shared ref)
No control-path influence	No write path into any upstream data structure
Deterministic outputs under identical inputs	Pure function composition over fixed params
Removable without system impact	Advisory outputs only; zero coupling

Feature flags

Feature	Default	Effect
std	yes	Enables CLI, I/O, plotting, networking, and all dataset adapters.
(none)	—	Kernel-only build: sign, grammar, syntax, semantics, policy, process_context, units. Suitable for bare-metal / RTOS / FPGA deployments.

no_std kernel surface

When compiled with --no-default-features, the following modules are available and require only alloc:

• process_context — recipe-step admissibility LUT and maintenance hysteresis
• units — type-safe physical quantity newtypes
• signs — residual sign computation (drift, slew)
• sign — streaming sign point construction
• grammar — three-state admissibility FSM with hysteresis
• grammar::layer — six-state streaming grammar
• syntax — motif classifier
• policy — decision ranking
• semantics — heuristics bank lookup
• config — pipeline configuration
• nominal — healthy-window model
• residual — residual set construction
• input — residual and alarm stream types

Modules

baselines

calibration

cli

cohort

Deterministic feature-cohort DSA selection and rating-delta forecast.

config

dataset

error

failure_driven

grammar

heuristics

input

interface

metrics

missingness

Missingness-aware grammar: invalidates drift computation when sensor data is absent for more than MAX_CONSECUTIVE_MISSING_RUNS consecutive runs.

multivariate_observer

Multivariate observer — ingests PCA/FDC residual streams and provides structural interpretation via the StructuralPCA module.

nominal

non_intrusive

output_paths

phm2018_loader

pipeline

plots

policy

precursor

preprocessing

process_context

Recipe-step and tool-state context for admissibility gating.

report

residual

secom_addendum

semantics

semiotics

sign

signature

Schema-validated JSON signature format for DSFB heuristics and motifs.

signs

syntax

traceability

unified_value_figure

units

Type-safe physical quantity wrappers for semiconductor process variables.

Structs

Episode

A structured episode produced by the DSFB observer layer.

Functions

observe

Read-only observation of a raw residual slice.

Type Aliases

Episodes

A list of Episode values returned by observe.