SACA Smart Factory Data Analytics 4

Question 1

Which protocol is most commonly used to transport IoT sensor data from factory floor devices to a broker in a smart factory?

Accepted Answer

MQTT

Answer

MQTT is a lightweight publish-subscribe protocol designed for constrained IoT devices and low-bandwidth, high-latency networks typical in factory environments.

Question 2

A factory analyst wants to identify which combination of machine parameters most frequently precedes a product defect. Which analytical approach is most appropriate?

Accepted Answer

Association rule mining on process parameter logs

Answer

Association rule mining discovers frequent co-occurring parameter combinations in event logs, revealing multi-factor patterns that precede defects.

Question 3

What is 'data drift' in the context of a smart factory ML model deployed in production?

Accepted Answer

A gradual change in the statistical distribution of incoming data compared to training data

Answer

Data drift occurs when the real-world input distribution shifts over time, causing a model trained on older data to lose prediction accuracy.

Question 4

In a smart factory dashboard, a line chart shows sudden spikes in cycle time every Monday morning. What is the most likely root cause to investigate first?

Accepted Answer

A weekly scheduled maintenance or shift changeover event

Answer

Periodic spikes aligned with a calendar pattern (Monday mornings) strongly suggest a recurring scheduled event such as maintenance, startup, or shift handover.

Question 5

Which technique reduces the dimensionality of high-dimensional sensor data while preserving the most variance, aiding visualization and model training?

Accepted Answer

Principal Component Analysis (PCA)

Answer

PCA projects high-dimensional data onto a lower-dimensional space that captures the maximum variance, making it easier to visualize patterns and train models.

SACA - Smart Automation Certification Alliance Practice Test

SACA - Smart Automation Certification Alliance Practice Test

SACA Smart Factory Data Analytics 4