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// Configuration object for centralized settings
const TabbedNavConfig = {
  DESKTOP_BREAKPOINT: 1201,
  DEBOUNCE_DELAY: 250,
  OPEN_FIRST_TAB: true,
  CLOSE_TAB_ON_MOUSEOUT: false
};

// Custom config for tabbed hero containers
const tabbedHeroConfig = {
  ...TabbedNavConfig,
  OPEN_FIRST_TAB: false,
  CLOSE_TAB_ON_MOUSEOUT: true
};

// Function to determine the appropriate config based on container context
function getConfigForContainer(container) {
  // Check if container has closest ancestor with [data-tabbed-hero="true"]
  const heroAncestor = container.getAttribute('data-tabbed-hero') === 'true'   ? container : container.closest('[data-tabbed-dropdown="true"]');
  
  if (heroAncestor) {
    return tabbedHeroConfig;
  }
  
  // Check for specific data-instance attributes (if you still want to support them)
  // const instance = container.getAttribute('data-instance');
  // if (instance === 'two') {
  //   // You can still have specific instance configs if needed
  //   return {
  //     ...TabbedNavConfig,
  //     OPEN_FIRST_TAB: false,
  //     CLOSE_TAB_ON_MOUSEOUT: true
  //   };
  // }
  
  // Default config
  return TabbedNavConfig;
}

class TabbedNavigation {
  constructor(container, config = TabbedNavConfig) {
    this.container = container;
    this.config = config;
    this.activeItem = null;
    this.isDesktop = window.innerWidth >= this.config.DESKTOP_BREAKPOINT;
    this.hasMouseListeners = false;
    this.megamenuParent = null;
    this.megamenuObserver = null;
    
    // Initialize bound handlers - these will be reused across reinitializations
    this.mouseEnterHandler = this.handleMouseEnter.bind(this);
    this.mouseLeaveHandler = this.handleMouseLeave.bind(this);
    this.resizeHandler = this.debounce(this.handleResize.bind(this), this.config.DEBOUNCE_DELAY);
    this.handleMegamenuToggle = this.handleMegamenuToggle.bind(this);
    
    this.init();
  }

  init() {
    // Cache DOM elements fresh each time
    this.navItems = [...this.container.querySelectorAll('.dwc-tabbed-nav-list__li')];
    this.elementsCache = new Map();
    
    this.cacheElements();
    this.setupAccessibility();
    this.setupMegamenuObserver();
    this.bindEvents();

    // Set initial state
    this.updateLayout();
    this.setBackText()

    // Show first item on page load only if desktop, not nested, and OPEN_FIRST_TAB is true
    if (this.navItems.length > 0 && this.isDesktop && this.config.OPEN_FIRST_TAB) {
      setTimeout(() => {
        const firstItem = this.navItems[0];

        // Count how many .dwc-tabbed-nav-container ancestors this.container has
        let count = 0;
        let current = this.container.parentElement;
        while (current) {
          if (current.classList?.contains('dwc-tabbed-nav-container')) {
            count++;
          }
          current = current.parentElement;
        }

        const isNested = count >= 1;

        if (!isNested && this.elementsCache.has(firstItem)) {
          this.showTab(firstItem);
        }
      }, 0);
    }
  }

  // Setup observer for megamenu parent
  setupMegamenuObserver() {
    // Find the .brx-has-megamenu parent
    this.megamenuParent = this.container.closest('.brx-has-megamenu');
    
    if (this.megamenuParent) {
      // Set initial inert state
      this.updateInertState();
      
      // Create a MutationObserver to watch for class changes
      this.megamenuObserver = new MutationObserver((mutations) => {
        mutations.forEach((mutation) => {
          if (mutation.type === 'attributes' && mutation.attributeName === 'class') {
            this.updateInertState();
          }
        });
      });
      
      // Start observing the megamenu parent for class changes
      this.megamenuObserver.observe(this.megamenuParent, {
        attributes: true,
        attributeFilter: ['class']
      });
    }
  }

  // Update inert state based on megamenu open/closed state
  updateInertState() {
    if (!this.megamenuParent) return;
    
    const isOpen = this.megamenuParent.classList.contains('open');
    
    if (isOpen) {
      this.container.removeAttribute('inert');
    } else {
      this.container.setAttribute('inert', '');
    }
  }

  // Handle megamenu toggle (for manual triggering if needed)
  handleMegamenuToggle() {
    this.updateInertState();
  }

  // Method to clean up event listeners and reset state
  cleanup() {
    // Remove all event listeners
    this.container.removeEventListener('click', this.handleClick);
    this.container.removeEventListener('keydown', this.handleKeydown);
    this.container.removeEventListener('focus', this.handleFocus);
    
    // Remove mouse listeners if they exist
    if (this.hasMouseListeners) {
      this.container.removeEventListener('mouseenter', this.mouseEnterHandler, true);
      this.container.removeEventListener('mouseleave', this.mouseLeaveHandler, true);
    }
    
    // Remove resize listener
    window.removeEventListener('resize', this.resizeHandler);
    
    // Clean up megamenu observer
    if (this.megamenuObserver) {
      this.megamenuObserver.disconnect();
      this.megamenuObserver = null;
    }
    
    // Reset state
    this.activeItem = null;
    this.hasMouseListeners = false;
    this.megamenuParent = null;
    
    // Clear caches
    if (this.elementsCache) {
      this.elementsCache.clear();
    }
    this.navItems = [];
    
    // Reset all tab states and accessibility attributes
    const allNavItems = this.container.querySelectorAll('.dwc-tabbed-nav-list__li');
    allNavItems.forEach(item => {
      const button = item.querySelector('.dwc-tabbed-nav-list__li__button') || 
                    item.querySelector('.dwc-tabbed-nav-list__li__btn-txt');
      const content = item.querySelector('.dwc-tabbed-nav-list__li__content');
      
      // Remove classes
      item.classList.remove('active');
      
      // Reset button attributes
      if (button) {
        button.removeAttribute('role');
        button.removeAttribute('aria-controls');
        button.removeAttribute('aria-expanded');
        button.removeAttribute('aria-selected');
        button.removeAttribute('tabindex');
        button.removeAttribute('id');
      }
      
      // Reset content attributes
      if (content) {
        content.removeAttribute('role');
        content.removeAttribute('aria-labelledby');
        content.removeAttribute('id');
        content.removeAttribute('aria-hidden');
        content.style.maxHeight = '';
      }
      
      // Remove data attributes
      item.removeAttribute('data-tab-index');
    });
    
    // Reset nav list role
    const navList = this.container.querySelector('.dwc-tabbed-nav-list');
    if (navList) {
      navList.removeAttribute('role');
    }
    
    // Remove inert attribute
    this.container.removeAttribute('inert');
  }

  // Public method to reinitialize the navigation
  reinitialize() {
    this.cleanup();
    this.isDesktop = window.innerWidth >= this.config.DESKTOP_BREAKPOINT; // Use config breakpoint
    this.init();
  }

  // Cache DOM elements to avoid repeated queries
  cacheElements() {
    const uniqueIdBase = `tab-${Date.now()}`;
    
    this.navItems.forEach((item, index) => {
      const button = item.querySelector('.dwc-tabbed-nav-list__li__button') || 
                    item.querySelector('.dwc-tabbed-nav-list__li__btn-txt');
      const content = item.querySelector('.dwc-tabbed-nav-list__li__content');
      
      this.elementsCache.set(item, {
        button,
        content,
        uniqueId: `${uniqueIdBase}-${index}`,
        index
      });
    });
  }

  setupAccessibility() {
    const navList = this.container.querySelector('.dwc-tabbed-nav-list');
    if (!navList) return;
    
    navList.setAttribute('role', 'tablist');
    
    for (const [item, cache] of this.elementsCache) {
      const { button, content, uniqueId, index } = cache;
      
      if (button) {
        button.setAttribute('role', 'tab');
        button.setAttribute('aria-controls', `${uniqueId}-panel`);
        button.setAttribute('aria-expanded', 'false');
        button.setAttribute('aria-selected', 'false');
        button.setAttribute('tabindex', '0');
        button.setAttribute('id', `${uniqueId}-tab`);
      }
      
      if (content) {
        content.setAttribute('role', 'tabpanel');
        content.setAttribute('aria-labelledby', `${uniqueId}-tab`);
        content.setAttribute('id', `${uniqueId}-panel`);
        content.setAttribute('aria-hidden', 'true');
      }
      
      item.setAttribute('data-tab-index', index);
    }
  }

  bindEvents() {
    // Store bound handlers for cleanup
    this.handleClick = this.handleClick.bind(this);
    this.handleKeydown = this.handleKeydown.bind(this);
    this.handleFocus = this.handleFocus.bind(this);
    
    // Single event delegation for better performance
    this.container.addEventListener('click', this.handleClick);
    this.container.addEventListener('keydown', this.handleKeydown);
    this.container.addEventListener('focus', this.handleFocus, true);
    
    // Passive resize listener for better performance
    window.addEventListener('resize', this.resizeHandler, { passive: true });
    
    this.updateMouseListeners();
  }

  updateMouseListeners() {
    if (this.isDesktop && !this.hasMouseListeners) {
      this.container.addEventListener('mouseenter', this.mouseEnterHandler, true);
      this.container.addEventListener('mouseleave', this.mouseLeaveHandler, true);
      this.hasMouseListeners = true;
    } else if (!this.isDesktop && this.hasMouseListeners) {
      this.container.removeEventListener('mouseenter', this.mouseEnterHandler, true);
      this.container.removeEventListener('mouseleave', this.mouseLeaveHandler, true);
      this.hasMouseListeners = false;
    }
  }

  // Helper method to get sibling nav items (nav items in the same container level)
  getSiblingNavItems(navItem) {
    // Find the direct parent container of this nav item
    const navItemContainer = navItem.closest('.dwc-tabbed-nav-list');
    if (!navItemContainer) return [];
    
    // Get all nav items that are direct children of the same container
    const siblingItems = [...navItemContainer.querySelectorAll('.dwc-tabbed-nav-list__li')];
    
    // Filter to only include items that are siblings (not the navItem itself)
    // and check if they belong to any TabbedNavigation instance
    return siblingItems.filter(item => item !== navItem);
  }

  handleFocus(e) {
    if (!this.isDesktop) return;

    const button = e.target.closest('[role="tab"]');
    if (!button) return;
    
    const navItem = button.closest('.dwc-tabbed-nav-list__li');
    if (!navItem || !this.elementsCache.has(navItem)) return;
    
    this.handleTabInteraction(navItem, 'focus');
  }

  handleClick(e) {
    const navItem = e.target.closest('.dwc-tabbed-nav-list__li');
    if (!navItem || !this.elementsCache.has(navItem)) return;
    
    const button = e.target.closest('.dwc-tabbed-nav-list__li__button, .dwc-tabbed-nav-list__li__btn-txt');
    if (!button) return;
    
    e.preventDefault();
    this.handleTabInteraction(navItem, 'click');
  }

  handleKeydown(e) {
    const button = e.target.closest('[role="tab"]');
    if (!button) return;
    
    const navItem = button.closest('.dwc-tabbed-nav-list__li');
    if (!navItem || !this.elementsCache.has(navItem)) return;
    
    const { index: currentIndex } = this.elementsCache.get(navItem);
    
    switch (e.key) {
      case 'Enter':
      case ' ':
        e.preventDefault();
        this.handleTabInteraction(navItem, 'keyboard');
        break;
      case 'ArrowRight':
      case 'ArrowDown':
        e.preventDefault();
        this.focusNextTab(currentIndex);
        break;
      case 'ArrowLeft':
      case 'ArrowUp':
        e.preventDefault();
        this.focusPrevTab(currentIndex);
        break;
      case 'Home':
        e.preventDefault();
        this.focusTab(0);
        break;
      case 'End':
        e.preventDefault();
        this.focusTab(this.navItems.length - 1);
        break;
    }
  }
  
  handleMouseEnter(e) {
    if (!this.isDesktop) return;
    
    const navItem = e.target.closest('.dwc-tabbed-nav-list__li') || 
                   (e.target.matches('.dwc-tabbed-nav-list__li') ? e.target : null);
    if (!navItem || !this.elementsCache.has(navItem)) return;
    
    this.handleTabInteraction(navItem, 'hover');
  }

  handleMouseLeave(e) {
    if (!this.isDesktop) return;
    
    // Only close tabs if CLOSE_TAB_ON_MOUSEOUT is enabled
    if (this.config.CLOSE_TAB_ON_MOUSEOUT) {
      // Check if mouse is leaving the entire container
      const rect = this.container.getBoundingClientRect();
      const { clientX, clientY } = e;
      
      // Check if mouse position is outside the container bounds
      const isOutsideContainer = (
        clientX < rect.left || 
        clientX > rect.right || 
        clientY < rect.top || 
        clientY > rect.bottom
      );
      
      if (isOutsideContainer) {
        this.hideAllTabs();
      }
    }
    // If CLOSE_TAB_ON_MOUSEOUT is false, keep content visible (original behavior)
  }

  // Unified method to handle all tab interactions with nesting support
  handleTabInteraction(navItem, interactionType) {
    if (!this.elementsCache.has(navItem)) return;
    
    if (this.isDesktop) {
      // Simply hide siblings and show the target - works for all scenarios
      this.hideSiblingTabs(navItem);
      this.showTab(navItem);
    } else {
      // Mobile accordion behavior
      if (interactionType === 'click' || interactionType === 'keyboard') {
        this.toggleTabMobile(navItem);
      }
    }
  }

  // Hide only sibling tabs (same container level)
  hideSiblingTabs(navItem) {
   // console.log('Nav Item: ', navItem)
    const siblings = this.getSiblingNavItems(navItem);
    
    siblings.forEach(sibling => {
      
         //console.log('sibling: ', sibling)
      // Only hide siblings that have the active class to avoid affecting other instances
      if (sibling.classList.contains('active')) {
        this.hideSiblingTab(sibling);
      }
    });
  }

  // Hide a sibling tab (used when we know it's a sibling from another instance)
  hideSiblingTab(navItem) {
    const button = navItem.querySelector('.dwc-tabbed-nav-list__li__button') || 
                  navItem.querySelector('.dwc-tabbed-nav-list__li__btn-txt');
    const content = navItem.querySelector('.dwc-tabbed-nav-list__li__content');
    
    if (content && button) {
      content.setAttribute('aria-hidden', 'true');
      button.setAttribute('aria-expanded', 'false');
      button.setAttribute('aria-selected', 'false');
      navItem.classList.remove('active');
      
      // Also handle mobile accordion collapse
      if (!this.isDesktop) {
        content.style.maxHeight = '0';
      }
    }
  }

  // Mobile-specific toggle behavior with proper nesting support
  toggleTabMobile(navItem) {
    if (!this.elementsCache.has(navItem)) return;
    
    const isActive = navItem.classList.contains('active');
    
    if (isActive) {
      this.collapseTab(navItem);
    } else {
      // Close sibling tabs and open this one
      this.hideSiblingTabs(navItem);
      this.expandTab(navItem);
    }
  }

  toggleTab(navItem) {
    if (!this.elementsCache.has(navItem)) return;
    
    if (this.isDesktop) {
      this.handleTabInteraction(navItem, 'click');
    } else {
      this.toggleTabMobile(navItem);
    }
  }

  showTab(navItem) {
    if (!this.elementsCache.has(navItem)) return;
    
    const { button, content } = this.elementsCache.get(navItem);
    
    if (content && button) {
      content.setAttribute('aria-hidden', 'false');
      button.setAttribute('aria-expanded', 'true');
      button.setAttribute('aria-selected', 'true');
      navItem.classList.add('active');
    }
    
    this.setActiveTab(navItem);
  }

  hideTab(navItem) {
    if (!this.elementsCache.has(navItem)) return;
    
    const { button, content } = this.elementsCache.get(navItem);
    
    if (content && button) {
      content.setAttribute('aria-hidden', 'true');
      button.setAttribute('aria-expanded', 'false');
      button.setAttribute('aria-selected', 'false');
      navItem.classList.remove('active');
    }
    
    // Only clear activeItem if it belongs to THIS navigation instance
    // and it's the exact item being hidden
    if (this.activeItem === navItem && this.navItems.includes(navItem)) {
      this.activeItem = null;
    }
  }

  expandTab(navItem) {
    if (!this.elementsCache.has(navItem)) return;
    
    // Close sibling tabs
    this.hideSiblingTabs(navItem);
    
    this.showTab(navItem);
    
    // Smooth height animation
    const { content } = this.elementsCache.get(navItem);
    if (content) {
      const height = content.scrollHeight;
      content.style.maxHeight = `${height}px`;
    }
  }

  collapseTab(navItem) {
    if (!this.elementsCache.has(navItem)) return;
    
    this.hideTab(navItem);
    
    const { content } = this.elementsCache.get(navItem);
    if (content) {
      content.style.maxHeight = '0';
    }
  }

  hideAllTabs() {
    this.navItems.forEach(item => this.hideTab(item));
  }

  setActiveTab(navItem) {
    // Only update aria-selected for tabs in THIS navigation instance
    this.navItems.forEach(item => {
      const cache = this.elementsCache.get(item);
      if (cache?.button) {
        cache.button.setAttribute('aria-selected', item === navItem ? 'true' : 'false');
      }
    });
    
    // Only set activeItem if this navItem belongs to THIS navigation instance
    if (this.navItems.includes(navItem)) {
      this.activeItem = navItem;
    }
  }

  focusTab(index) {
    if (index >= 0 && index < this.navItems.length) {
      const cache = this.elementsCache.get(this.navItems[index]);
      if (cache?.button) {
        cache.button.focus();
      }
    }
  }

  focusNextTab(currentIndex) {
    const nextIndex = (currentIndex + 1) % this.navItems.length;
    this.focusTab(nextIndex);
  }

  focusPrevTab(currentIndex) {
    const prevIndex = currentIndex === 0 ? this.navItems.length - 1 : currentIndex - 1;
    this.focusTab(prevIndex);
  }

  handleResize() {
    const wasDesktop = this.isDesktop;
    this.isDesktop = window.innerWidth >= this.config.DESKTOP_BREAKPOINT; // Use config breakpoint
    
    if (wasDesktop !== this.isDesktop) {
      this.updateMouseListeners();
      this.updateLayout();
    }
  }

  updateLayout() {
    const currentlyActive = this.activeItem;

    // Reset all states
    this.hideAllTabs();

    // Clear inline styles
    this.navItems.forEach(item => {
      const cache = this.elementsCache.get(item);
      if (cache?.content) {
        cache.content.style.maxHeight = '';
      }
    });

    if (this.isDesktop) {
      // Determine if this tab instance is nested
      let count = 0;
      let current = this.container.parentElement;
      while (current) {
        if (current.classList?.contains('dwc-tabbed-nav-container')) {
          count++;
        }
        current = current.parentElement;
      }
      const isNested = count >= 1;

      if (!isNested && this.config.OPEN_FIRST_TAB) {
        if (currentlyActive) {
          this.showTab(currentlyActive);
        } else if (this.navItems.length > 0) {
          this.showTab(this.navItems[0]);
        }
      }
    }
  }

  setBackText(){
    let tabElement = document.querySelector('.dwc-tabbed-nav-container');
    let tabBackText = tabElement.getAttribute('data-back-text')
    document.querySelectorAll('.dwc-tabbed-nav-list__li__button').forEach(tabBtn => {
        const textContent = tabBtn.textContent.trim();
        const tabIcon = tabBtn.querySelector('.dwc-tabbed-nav-list__li__arrow-icon');
        if (tabIcon) {
            tabIcon.setAttribute('data-text', textContent);
            tabIcon.setAttribute('data-back-text', tabBackText);
        }
    });
  }

  // Simple debounce for resize
  debounce(func, wait) {
    let timeout;
    return function executedFunction(...args) {
      const later = () => {
        clearTimeout(timeout);
        func(...args);
      };
      clearTimeout(timeout);
      timeout = setTimeout(later, wait);
    };
  }

  // Public method to destroy the instance completely
  destroy() {
    this.cleanup();
    // Additional cleanup can be added here if needed
  }

  // Public method to manually update inert state (if needed)
  updateInert() {
    this.updateInertState();
  }
}

// Simplified initialization on DOM ready
document.addEventListener('DOMContentLoaded', function() {
  const tabbedNavContainers = document.querySelectorAll('.dwc-tabbed-nav-container');
  
  tabbedNavContainers.forEach(container => {
    // Skip if this container is nested inside another dwc-tabbed-nav-container
    const parentNavContainer = container.parentElement.closest('.dwc-tabbed-nav-container');
    if (parentNavContainer) {
      return; // Skip nested containers
    }
    
    // Get the appropriate config for this container
    const config = getConfigForContainer(container);
    
    // Initialize with the determined config
    new TabbedNavigation(container, config);
  });
});

// For dynamic content - Updated version
window.initTabbedNav = function(container, customConfig = null) {
  if (container && container.classList.contains('dwc-tabbed-nav-container')) {
    // Check if this is a nested container
    const parentNavContainer = container.parentElement.closest('.dwc-tabbed-nav-container');
    if (parentNavContainer) {
      return null; // Don't initialize nested containers
    }
    
    // Use custom config if provided, otherwise determine config automatically
    const config = customConfig || getConfigForContainer(container);
    return new TabbedNavigation(container, config);
  }
  return null;
};

/*
// TO REINITIALIZE USE THIS
// Create an instance of TabbedNavigation
const tabbedNav = new TabbedNavigation(document.querySelector('.dwc-tabbed-nav-container'));

// Call reinitialize on the instance
tabbedNav.reinitialize();

// TO USE WITH CUSTOM CONFIG
const customConfig = {
  DESKTOP_BREAKPOINT: 768,
  DEBOUNCE_DELAY: 300,
  OPEN_FIRST_TAB: false,  // This will prevent first tab from opening automatically
  CLOSE_TAB_ON_MOUSEOUT: true  // This will close tabs when mouse leaves container
};
const tabbedNavCustom = new TabbedNavigation(document.querySelector('.dwc-tabbed-nav-container'), customConfig);

// TO UPDATE ON URL CHANGE
function onUrlChange() {
    setTimeout(function () {
const tabbedNav = new TabbedNavigation(document.querySelector('.dwc-tabbed-nav-container'));
tabbedNav.reinitialize();

    }, 1500); // Delay execution by 2 seconds
}

// Listen for popstate event (history navigation)
window.addEventListener('popstate', onUrlChange);

// Listen for hashchange event (URL hash change)
window.addEventListener('hashchange', onUrlChange);

// Handle pushState and replaceState
(function (history) {
    const pushState = history.pushState;
    const replaceState = history.replaceState;

    history.pushState = function (state) {
        if (typeof history.onpushstate == "function") {
            history.onpushstate({ state: state });
        }
        const result = pushState.apply(history, arguments);
        onUrlChange(); // Call the function when pushState is used
        return result;
    };

    history.replaceState = function (state) {
        if (typeof history.onreplacestate == "function") {
            history.onreplacestate({ state: state });
        }
        const result = replaceState.apply(history, arguments);
        onUrlChange(); // Call the function when replaceState is used
        return result;
    };
})(window.history);

*/

console.log('%c<Jamie Sheehan Web Design Mega Menu Pro Tabbed Navigation v1.0>', 'color: #b388eb');

Refinery Digital Transformation: Operational Excellence at Galp Sines | Maron

February 12, 2026

Refinery representing the balance between efficiency, compliance, and sustainability in digital refinery operations

In this post...

All Articles

How partnership-led digitalisation is helping refiners balance efficiency, compliance, and sustainability.

Operational excellence in refining is no longer just about efficiency. Today’s refiners must simultaneously strengthen energy security, meet tightening regulatory requirements, and remain competitive in volatile markets. At Galp’s Sines refinery, Maron partnered closely with operational teams to turn these pressures into a structured, future-ready transformation.

Operational excellence isn’t achieved through technology alone. It’s built through partnership, trust, and continuous improvement.

— Jon Henderson, Division Lead, Maron

The Refining Trilemma: Security, Compliance, Competitiveness

Modern refining sits at the intersection of three critical demands:

  • Energy security – ensuring resilient supply in unpredictable markets
  • Regulatory compliance and sustainability – meeting evolving environmental and reporting standards
  • Competitiveness and efficiency – reducing costs while increasing throughput without compromising safety or quality

At Galp’s Sines refinery, these challenges were already well understood. What was needed was a way to address them holistically, without disrupting day-to-day operations.

Refinery digital transformation succeeds when it reflects operational reality. Rather than deploying tools in isolation, Maron embedded itself within refinery workflows to understand where value could be unlocked.

Partnership Over Products

With more than two decades of experience supporting Europe’s leading refiners, Maron approaches digital transformation differently. At Sines, the focus was never on deploying software for its own sake, but on working with refinery teams as long-term partners.

This meant:

  • Aligning digital tools with existing operational practices
  • Respecting the refinery’s culture of continuous improvement
  • Building trust through collaboration, not disruption

We don’t just provide software. We embed ourselves in our clients’ operational reality.

— Mike Czegeledy, VP Enterprise Sales, Maron

Turning Refinery Pain Points into Progress

Like many large refining operations, Sines faced a familiar set of challenges:

  • Duplicated and mistrusted data, slowing decisions and increasing risk
  • Manual, paper-based workflows, delaying approvals and collaboration
  • Inconsistent sustainability and compliance tracking, particularly for biomaterials and emissions
  • Siloed systems, limiting visibility and complicating upgrades

Individually manageable, together these issues created friction across planning, reporting, and operations.

The goal was not just efficiency gains, but clarity, confidence, and consistency across the refinery.

From Insight to Action: Maron’s Structured Approach

Maron began with a refinery-wide process review, examining OAS workflows across departments. This uncovered strong foundations, such as daily mass balance discipline, alongside clear opportunities for improvement.

Next came benchmarking against industry best practices, highlighting where digital workflows could support:

  • Greater operational efficiency
  • Improved compliance and auditability
  • More reliable sustainability reporting

The outcome was a pragmatic roadmap balancing quick wins (training, data clean-up, workflow improvements) with long-term initiatives, including OAS v6 upgrades and biomaterial tracking readiness.

Tangible Improvements, Strategic Impact

The benefits of this partnership-led approach were felt quickly.

Already delivering:

  • A clear roadmap for operational excellence
  • Faster, cleaner workflows with a single source of truth
  • Stronger collaboration across departments

Strategic outcomes taking shape:

  • Robust biomaterial tracking to support sustainability compliance
  • Shared ownership of OAS across the organisation
  • Smoother communication and fewer operational silos

Digital tools didn’t just improve performance – they unlocked transparency, auditability, and continuous improvement.

— Chris Roland, Projects Director, Maron

Efficiency was only the starting point. The real value came from shared visibility, trust in data, and a foundation for future sustainability initiatives.

Why It Worked: Vision, Commitment, Culture

Technology alone does not deliver transformation. At Sines, success was driven by:

  • Leadership willing to challenge teams and embrace change
  • Consistent investment in digitalisation
  • A culture that views operational excellence as a continuous journey – not a one-off project

This alignment allowed Maron and Galp to focus on long-term value rather than short-term fixes.

A Future-Facing Collaboration

The partnership continues to evolve, supporting:

  • HVO plant integration
  • Decarbonisation and sustainability goals
  • Data-driven decision-making across the refinery

Operational excellence is not achieved overnight but with the right partnership, it becomes measurable, practical, and sustainable.

Ready to strengthen operational excellence at your refinery?

Discover how partnership-led digitalisation can improve efficiency, compliance, and sustainability across your operations.

Talk to Maron’s refining experts or contact sales@maronsystems.co.uk to explore how this approach could work for you.

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Additional Benefits

  • Accelerated financial results for real-time decision making
  • Automated hydrocarbon pricing based on quality inspection results for accountants
  • Incorporating historical oil losses per location into transactions to reduce/eliminate oil loss claims
  • Identify differences between test method nominated versus method performed by inspection companies
  • Communicate real-time test results as they are available for prompt trading opportunities
  • Inspection cost savings from use of Navarik Inspection Price Estimator
  • All data centralised with the ability to extract key information for data analytics