Professional Engineer, Construction Division | Construction Planning, Construction Equipment, and Estimation R05 Elective Subject III Model Answers (III-1/III-2)

These are model answers compliant with the revised competencies for the 2026 fiscal year.

This article reflects the following revision points in the answers for both problems.

• Utilization of data and information technology: Specifically demonstrate emission data during construction, BIM/CIM models, and ICT construction data as the basis for identifying issues and solutions.

• Incorporating stakeholder opinions and building consensus: Clearly state the consultation process with residents, project owners, contractors, and relevant organizations in the solutions.

• Achieving sustainable outcomes: Discuss issues and solutions from the three perspectives of society, economy, and environment, while also considering respect for cultural values.

For details on the revised competencies, please see Explanation of the Professional Engineer Second-Stage Examination Competency Revision (2026 Fiscal Year).

This article is for the following people

• Those who are planning to take or have previously taken the 2023 Professional Engineer Second-Stage Examination, Construction Division, Elective Subject III (Construction Planning, Construction Equipment, and Estimation) and are working on essay preparation for three answer sheets.

• Those who want to check model answers for both III-1 and III-2 so they can handle either choice on the actual exam, even though they only need to select one of the two problems.

• Those who want to know how to discuss frequently appearing recent themes like carbon neutrality (III-1) or the construction industry's two-day workweek and work-style reform (III-2) from the perspective of a project owner.

• Those who want to confirm the format for summarizing issues, solutions, and risks on three answer sheets for problems with conditions such as "constraints on the number of workers and financial constraints."

• Those who want to master differentiated essays from the practical perspective of having been involved in construction ordering and supervision as a former public servant (project owner).

What you will learn in this article

• The full text of the 2023 Construction Planning, Construction Equipment, and Estimation Elective Subject III questions (both III-1 and III-2 are reprinted in the article).

• The three-stage essay structure and project owner perspective approach for each of III-1 (efforts toward carbon neutrality) and III-2 (two-day workweek and work-style reform).

• Full model answers for both problems (approx. 1,600 characters each) and checkpoints from the grader's perspective.

• Includes a PDF that allows you to print the problem text + full model answers (can be used for handwriting practice on answer sheets).

This article presents answer examples written from the practical experience of having been involved in construction ordering and supervision as a former public servant (project owner) for both III-1 and III-2 of the 2023 Professional Engineer Second-Stage Examination, Construction Division, Elective Subject III (Construction Planning, Construction Equipment, and Estimation).

Elective Subject III is a subject that tests problem-solving ability, and you must write an essay using three answer sheets (within approximately 1,800 characters) in a three-stage structure of issue identification, solutions, and measures for residual risks.

Although you will choose one of the two problems to answer on the actual exam, this article covers both problems that were presented so that you can handle whichever one you choose.

Each answer demonstrates how to construct the points required by the question using a logical chain of 'Current Situation/Issues → Solutions → Risks/Countermeasures,' and how to incorporate the unique perspective of the client (public agency) for construction planning, construction equipment, and estimation into the answer.

Other articles and model answers by subject for the Construction Division can be viewed from the 'Construction Division Table of Contents'.