Construction Implementation and Site Management Phases

Phase of Construction and Conduct

Implementation Phase Introduction

For the client who commissions the work, it is an investment from which they expect to get a return. For the contractor, the commission is performed by optimizing quality, cost, and time.

Stages of the Implementation Phase

The Site Visit

A regular, institutional, and agreed-upon meeting attended by legal representatives of the technical department, the client, and the builder to keep track of work, approve well-done tasks, propose new tasks, find new solutions to problems, and address all types of incidents.

Issues to be Addressed

• Work status: Check what has been done since the previous visit.
• Events: Accidents, rain, wind, or theft.
• Defects and Corrections: Two types of defects—those with no influence on safety or subsequent operation, and those that do.
• Material control: Check resistance, dimensions, features, etc.
• Work pace control: This depends on the human resources and materials available for the construction.
• Problem-solving: Some issues can be solved on-site, while others are resolved in the office.
• Approval of subsequent works: Management determines the start of operations after reviewing previous works.
• Contradictory prices: Work units often appear that were not covered by the program, such as:

• New material
• Change of structural type
• Appearance of items not provided in the original project

• Entries in the Order and Attendance Book: Recording all incidents that occurred during the site visit.

Defining Certification

A document that confirms the project management contract jobs completed up to a specified date, allowing payment by the customer according to the economic conditions in both the contract and the specifications between the client and the contractor.

Steps of Work Certification

Application and Retention Rates

To check the material implementation budget, which equals the cost of the work considering only direct costs, the following should be taken into account:

• Indirect costs (4%)
• Overhead construction company (10%)
• Industrial profit (6-9%)
• Value added tax (VAT: 16%)
• Discounts: Usually small except in cases of administration.
• Retentions (5-10%): Labor warranty that applies in each certification.

Minutes of Provisional Acceptance

A document signed by the three parties that recognizes the official completion of the works. In the provisional acceptance, it is necessary to:

• Set the date on which the guarantee period of the work begins.
• Ensure payment by the client for all work (excluding retention).
• Establish the steps for repairing parts of the non-conforming work.
• Return (if agreed upon) part of the retention or guarantees.