CA PLS Exam Preparation

Comprehensive preparation for the California Professional Land Surveyor (PLS) exam. Based on the January 2025 Test Plan with 6 modules and 57 topics. Content adapted from CalTrans LS/LSIT Video Exam Preparation Course materials.

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Lesson 7

Quality Assurance and Control

Quality Assurance and Control

Overview

Quality assurance (QA) and quality control (QC) processes ensure survey products meet specified standards. Implementing effective QA/QC is essential for professional practice and client satisfaction.

Learning Objectives

  • Distinguish between QA and QC
  • Implement field verification procedures
  • Review and check office work
  • Document quality processes

Key Concepts

QA vs. QC

Understanding the difference:

  • QA: Systematic processes to ensure quality (preventive)
  • QC: Specific checks to verify quality (detective)
  • Both are necessary for complete quality management

Field Quality Control

Verification in the field:

  • Equipment calibration and checks
  • Redundant measurements
  • Closure verification
  • Independent checks
  • Documentation review

Office Quality Control

Verification of office products:

  • Calculation checking
  • Map/plan review
  • Independent verification
  • Peer review
  • Final quality check

Documentation

Quality records include:

  • Procedures followed
  • Checks performed
  • Issues identified
  • Corrective actions
  • Approval signatures

Key Terms

  • Calibration: Adjustment to meet standard
  • Verification: Confirmation of meeting requirements
  • Check Set: Independent calculation of results

Practice Questions

  1. What is the difference between quality assurance and quality control?
  2. What quality control procedures should be applied to survey calculations?