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Index

A

accuracy (forecast)
 limitations of
 vs. reliability
 See also: trust; validation

AI-assisted forecasting
 scenario exploration
 human-in-the-loop systems
 See also: AI-Enabled Reasoning; deep learning

AI-Enabled Reasoning
 role in forecasting
 limitations of
 See also: LearningLab; human–AI collaboration

AI overconfidence
 risks of
 design corrections for
 See also: validation; governance

assumption validation
 in implicit models
 in forecasting systems
 See also: diagnostics; trust

ARIMA
 dependence modeling
 stability enforcement
 See also: SARIMA; implicit structure

ARIMAX
 external drivers
 conditional forecasting
 See also: dynamic regression

attention mechanisms
 in transformer models
 long-range dependence
 See also: deep learning

B

backtesting
 time-based validation
 role in trust
 See also: validation

behavior (forecast behavior)
 response to change
 stability over time
 See also: Structure → Behavior → Trust → Decision

bias–variance trade-off
 in forecasting models
 in machine learning
 See also: overfitting

business decision context
 role in forecasting design
 See also: decision context

C

causal drivers
 external variables
 decision relevance
 See also: ARIMAX; TSLM

component-based structure
 trend and seasonality
 interpretability
 See also: explicit structure; decomposition

conceptual framing
 role in learning
 decision linkage
 See also: Conceptual Sections

conditional forecasting
 with exogenous variables
 See also: ARIMAX

confidence (forecast confidence)
 interpretation of
 limitations of
 See also: uncertainty

context-aware forecasting
 external signals
 decision integration
 See also: feature-based forecasting

D

data conditions
 role in method selection
 See also: decision matrix

Data Understanding
 role in Four Analytical Pillars
 See also: Analytical Logic

decision alignment
 forecast–decision linkage
 See also: decision design

decision context
 types of decisions
 role in model choice
 See also: decision systems

decision design
 core pillar
 system design perspective
 See also: DesignStudio

decision matrix (forecasting)
 design interpretation
 usage guidelines
 See also: method selection

decision systems
 forecast integration
 organizational context
 See also: governance

decision usefulness
 priority over accuracy
 See also: forecasting by design

decomposition
 trend, seasonality, noise
 interpretation
 See also: explicit structure

deep learning
 learned representations
 forecasting applications
 See also: LSTM; transformers

design logic
 forecasting as system
 See also: forecasting by design

design misalignment
 common patterns
 corrections
 See also: overengineering; under-specification

diagnostics
 residual analysis
 model validation
 See also: trust

E

ensemble methods
 combining forecasts
 See also: machine learning

error interpretation
 business meaning
 decision implications
 See also: residuals

error lens
 understanding model limitations
 See also: diagnostics

ETS models
 error–trend–seasonal framework
 See also: Holt–Winters

explicit structure
 visible components
 interpretability
 See also: decomposition; TSLM

F

feature-based forecasting
 feature engineering
 ML approaches
 See also: machine learning

feature engineering
 lagged features
 rolling features
 See also: feature-based forecasting

forecast accuracy
 limitations
 context dependence
 See also: reliability

forecast behavior
 stability and responsiveness
 See also: behavior

forecast governance
 monitoring and control
 See also: governance

forecast reliability
 stability over time
 See also: trust

forecast stability
 importance in decision-making
 See also: reliability

forecast trust
 definition
 establishment mechanisms
 See also: validation; diagnostics

forecasting by design
 definition
 principles
 See also: decision systems

G

generative AI
 scenario generation
 limitations
 See also: AI-assisted forecasting

governance (forecast governance)
 monitoring systems
 decision accountability
 See also: trust

gradient boosting
 feature-based ML
 See also: machine learning

H

Holt–Winters methods
 adaptive components
 smoothing
 See also: ETS

human–AI collaboration
 roles and boundaries
 See also: AI-Enabled Reasoning

I

implicit structure
 dependence-based modeling
 discipline and diagnostics
 See also: ARIMA

interpretability
 importance in forecasting
 trade-offs
 See also: explicit structure

L

lagged variables
 temporal dependence
 See also: feature engineering

learning systems
 forecasting systems
 See also: decision systems

LSTM
 sequence modeling
 memory representation
 See also: deep learning

M

machine learning
 feature-based models
 validation requirements
 See also: feature-based forecasting

model behavior
 response patterns
 See also: behavior

model interpretability
 importance
 limitations
 See also: interpretability

model selection
 decision-based approach
 See also: decision matrix

model stability
 importance
 evaluation
 See also: stability

monitoring (forecast monitoring)
 performance tracking
 See also: governance

moving averages
 smoothing
 signal extraction
 See also: smoothing

N

noise (random variation)
 distinguishing from signal
 See also: signal vs. noise

NorthStar Retail Group
 case study
 system integration
 See also: decision systems

O

overfitting
 in ML and deep learning
 detection
 See also: validation

overengineering
 misalignment pattern
 See also: design misalignment

operational forecasting
 short-term decisions
 See also: decision context

P

pattern recognition
 in ML models
 See also: feature-based forecasting

persistence (time series)
 temporal dependence
 See also: ARIMA

prediction vs. forecasting
 distinction
 decision relevance
 See also: forecasting by design

R

random forests
 ML method
 See also: machine learning

regression models
 feature-based structure
 See also: TSLM

residual analysis
 diagnostics
 See also: diagnostics

residual diagnostics
 model validation
 See also: trust

robustness
 model reliability
 See also: stability

S

SARIMA
 seasonal dependence
 See also: ARIMA

scenario analysis
 decision exploration
 See also: generative AI

seasonality
 repeating patterns
 See also: decomposition

signal vs. noise
 distinction
 decision implications
 See also: smoothing

smoothing
 signal extraction
 See also: moving averages

stability (forecast stability)
 importance
 evaluation
 See also: trust

state-space models
 latent structure
 See also: implicit structure

structure (temporal structure)
 trend, seasonality, dependence
 See also: explicit structure; implicit structure

Structure → Behavior → Trust → Decision
 core framework
 application across chapters

T

TBATS
 multiple seasonality
 See also: explicit structure

temporal dependence
 persistence
 See also: ARIMA

temporal structure
 components and dependence
 See also: structure

time series
 definition
 applications

time horizon
 short vs. long-term forecasting
 See also: decision context

transformers
 attention-based models
 See also: deep learning

trust (forecast trust)
 definition
 mechanisms
 See also: validation; governance

TSLM (Time Series Linear Model)
 feature-based structure
 external drivers
 See also: regression models

U

uncertainty
 sources
 management
 See also: trust

uncertainty management
 decision implications
 See also: validation

under-specification
 misalignment pattern
 See also: design misalignment

V

validation
 out-of-sample testing
 time-based validation
 See also: trust

variance (forecast variance)
 uncertainty measure
 See also: bias–variance trade-off

volatility
 instability in data
 See also: uncertainty

W

workflow (forecasting workflow)
 end-to-end process
 See also: decision systems

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