https://sloap.org/journals/index.php/irjeis/issue/feed 2026-04-02T15:23:49+00:00 Editorial Office irjeis@sloap.org Open Journal Systems <p style="text-align: justify;"><strong>IRJEIS&nbsp;</strong>is published in English and it is open to authors around the world regardless of the nationality. It is currently published three times a year, i.e. in&nbsp;<em>January, March, May, July, September,&nbsp;</em>and<em>&nbsp;November.</em></p> https://sloap.org/journals/index.php/irjeis/article/view/2599 2026-02-22T09:09:30+00:00 B. Army barmy663@gmail.com I Wayan Sujahtra wayansujahtra@pnb.ac.id Syaiful Amri syaiful@pnp.ac.id Apwiddhal Apwiddhal widdpoli@gmail.com I Ketut Sutapa ketutsutapa@pnb.ac.id

<p>Managing the casting of large-volume raft foundations for the Cyclone Preheater Tower Foundation project required a supply of K-300 kg/cm2 ready-mix concrete. The raft foundation dimensions were 39,900 mm * 27,900 mm * 3,000 mm, with a volume of 3,338 m3. The casting had to be completed within six calendar days, a very tight timeframe for such a large volume of concrete. To ensure successful implementation and prevent additional timeframes, coordination between all parties involved in the project is essential at all stages. There are six stages of implementation: 1. Contractor collaboration with the batching plant company, 2. Reporting the results of the contractor-batch plant collaboration to the owner through the supervising consultant, 3. Casting preparation, 4. Concrete treatment before casting, 5. Concrete treatment during casting, 6. Concrete maintenance/curing.</p>

2026-02-22T00:00:00+00:00 Copyright (c) 2026 International research journal of engineering, IT and scientific research https://sloap.org/journals/index.php/irjeis/article/view/2600 2026-04-02T15:23:49+00:00 I Made Anom Santiana madeanomsantiana@pnb.ac.id I Gede Sastra Wibawa madeanomsantiana@pnb.ac.id I Wayan Wiraga madeanomsantiana@pnb.ac.id I Wayan Sujahtra madeanomsantiana@pnb.ac.id I Made Budiadi madeanomsantiana@pnb.ac.id M. Yusuf madeanomsantiana@pnb.ac.id

<p style="margin: 0cm; text-align: justify; text-justify: inter-ideograph;"><span lang="EN-ID" style="color: black;">Cost overruns remain a persistent challenge in construction projects, particularly in environmentally complex settings such as coastal areas. This study aims to analyse the determinants of variation orders and their impact on cost overruns in coastal construction projects, using a case study in Bali, Indonesia. A quantitative approach was adopted, with data collected through structured questionnaires from 30 construction professionals, including project managers, engineers, and quantity surveyors. The data were analysed using multiple linear regression to examine the influence of design, specification, safety, and scope-related factors on cost overruns. The results indicate that variation orders have a significant effect on cost overruns, both simultaneously and partially. Among the examined variables, scope changes were identified as the most dominant factor, followed by design, safety, and specification factors. These findings suggest that instability in project scope, combined with design revisions and operational adjustments, plays a critical role in driving cost escalation. Importantly, this study reveals that variation orders in coastal construction projects are not solely driven by internal project factors but are also strongly influenced by environmental uncertainty, such as tidal conditions, shoreline dynamics, and regulatory requirements.&nbsp;</span></p>

2026-04-02T00:00:00+00:00 Copyright (c) 2026 International research journal of engineering, IT and scientific research