Spire Experts Have Been Published by AACE and ASCE

Learn about Spire construction scheduling services


about aace’s cost engineering journal

The Cost Engineering journal is a bimonthly professional peer-reviewed journal and is the official technical publication of AACE. Cost Engineering features a variety of best-in-field technical articles. While the journal is included as a member-only benefit, subscriptions are not available.

To learn more about the
Cost Engineering journal,
please click here.


about ASCE’s journal of construction engineering and management

The Journal of Construction Engineering and Management is a multidisciplinary forum for research-based engineering and technical information related to building engineering design. The Journal covers a broad range of topics and disciplines including building systems, structural and, mechanical engineering, and sustainability.

To learn more about the Journal of Construction Engineering and Management,
please click here.

Two of Spire’s experts have been published in industry-recognized publications. Managing Consultant, Roger Nelson, PE, PSP, LEED AP, co-authored an article in the January/February 2019 edition of AACE International (AACE)’s Cost Engineering journal. Additionally, Spire Consultant, Roberto Leandro, PMP‘s article covering his Master’s thesis research was published in the American Society of Civil Engineer (ASCE)’s Journal of Construction Engineering and Management.

Mr. Nelson’s article, Primavera’s Float Path Calculation: Review and Analysis of Applications, calls attention to how construction schedulers and schedule analysts have taken to using Oracle’s Primavera P6 scheduling software’s Multiple Float Path functionalities to determine “near-critical” paths. By calculating the “most critical path” and “sub-critical” paths, the module ranks these paths in order of “criticality” by the Float Path Value. Mr. Nelson’s article features multiple case studies to demonstrate that the longest path remains the correct definition of critical path and total float values in a network without finish constraints remain the best way to gauge an activity’s proximity to the critical path. The Multiple Float Path feature of Primavera P6 does indeed provide useful information, however, practitioners need to be wary of relying on it for the determination and ranking of “near-critical” paths.

Mr. Leandro’s article titled Development and Application of a Production-Rate Resource for Contract Time Determination details a recommended process for estimating the overall duration of highway construction projects. Upon initial research of current contract time determination (CTD) procedures, the data sources were discovered to be disjointed and incomparable. Mr. Leandro’s research focuses on the development of an integrated Production Rate Resource, a single, easy-to-use reference of production-rate data gathered from publicly available sources. The resource was developed by gathering production-rate information from multiple sources and organizing the found data into a well-assembled Excel workbook. The final version of the Production Rate Resource compares data from 59 highway construction work items and resulted in a user-friendly database that is recommended as a resource for CTD practitioners.

Roger Nelson Spire Consulting Group headshotMr. Nelson has over 16 years of experience in both the public and private sectors of the architecture, engineering, and construction (AEC) industry. He provides construction and program management services by performing contract risk analysis, change order reviews, schedule oversight, and cost management throughout the lifecycle of a project. He also provides forensic services by analyzing, developing, and preparing claim evaluations, and support clients in mediation, arbitration, and litigation. Mr. Nelson is a certified Professional Engineer (PE) registered in California, a certified Planning and Scheduling Professional (PSP) with AACE International (AACE), and a LEED Accredited Professional (AP) with the United States Green Building Council (USGBC).


Roberto Leandro Spire Consulting Group headshotMr. Leandro has more than 10 years of international construction and project management experience. Mr. Leandro currently assists clients with developing and updating cost-loaded schedules per USACE requirements and provides post-construction forensic analyses of schedule delay, productivity impact, and quantification of damages. He is a certified project management professional (PMP) and serves on the Construction Leadership Council (CLC) Steering Committee.