SACA Factory Data Analytics 5

Question 1

What is the primary risk of using only accuracy as the evaluation metric for a factory defect detection model when defects are rare?

Accepted Answer

A model predicting 'no defect' always will achieve high accuracy but miss all defects

Answer

Accuracy cannot be calculated for imbalanced datasets

Answer

Accuracy overestimates false positives in rare-event scenarios

Answer

Accuracy is undefined when classes are unbalanced

Question 2

In factory analytics, what is a digital twin primarily used for?

Accepted Answer

Creating a virtual simulation of a physical asset for analysis and optimization

Answer

Storing backup copies of production databases

Answer

Duplicating sensor data across redundant servers

Answer

Generating synthetic data to augment small training sets

Question 3

Which edge computing benefit is most critical for real-time quality inspection on a high-speed production line?

Accepted Answer

Reduced latency by processing data locally near the source

Answer

Lower storage costs compared to cloud databases

Answer

Easier integration with ERP systems

Answer

Simplified model training without cloud resources

Question 4

A process engineer wants to understand which input variables most influence yield. Which analytical technique is most appropriate?

Accepted Answer

Design of Experiments (DoE) with main effects analysis

Answer

Time-series decomposition

Answer

Run chart with seasonal adjustment

Answer

K-nearest neighbor classification

Question 5

What does the 'Performance' component of OEE measure?

Accepted Answer

The ratio of actual production speed to the theoretical maximum speed

Answer

The percentage of scheduled time the machine was running

Answer

The proportion of produced parts that meet quality standards

Answer

The mean time between maintenance interventions

Question 6

Which data governance practice ensures that factory sensor data can be traced back to its source, collection time, and transformations applied?

Accepted Answer

Data lineage tracking

Answer

Data masking

Answer

Data deduplication

Answer

Schema validation

Question 7

A factory implements a rules-based alert that triggers when pressure exceeds 150 PSI. This is an example of which analytics type?

Accepted Answer

Threshold-based descriptive monitoring

Answer

Predictive analytics

Answer

Prescriptive analytics

Answer

Diagnostic root cause analysis