Introduction
P&IDs are often described as the nervous system of a pharmaceutical facility. They are foundational to ensure safe, accurate, and compliant facilities. In most pharmaceutical facilities, P&ID walkdowns are still handled in a pre-digital era: they rely on paper-based execution using printouts of drawings, manual highlighting, and checklists to confirm that piping, instruments, components in the equipment are installed as designed. Each manual update risks inconsistency. Each disconnected document slows collaboration. The result is a cascade of inefficiencies that affect every stage of a facility’s lifecycle from C&Q to validation, maintenance, routine operations and change management.
Though digital tools are increasingly used in design, construction, and turnover document management phases, digital P&ID walkdowns have still not yet been fully adopted. Some organizations claim to execute P&IDs digitally. However, in reality, they operate in a “paper-on-glass” mode using a PDF or other file format to execute P&ID digitally on tablet instead of truly digitalizing the P&ID walkdown and execution workflow.
Digital transformation initiatives are expanding across the pharmaceutical industry and there is an increasing demand for operational excellence, compliance, and efficiency. The goal is to have a fully digital P&ID walkdown with zero paper usage. This blog post explores the future perspective of P&ID walkdowns through a fully digital and AI-enabled ecosystem. The idea is not to replace humans, but to leverage their skills and capabilities for a higher purpose.
Current State
P&ID walkdowns are still performed manually by many organizations. Engineers rely on printed copies of the P&IDs, manually verifying and highlighting components, pipelines, instruments, and other elements in a system for compliance using color markers. Any nonconformities identified are then addressed and the P&ID needs to be reverified. After a walkdown, verified drawings are marked as “as-built”, ensuring the physical system or site condition matches the design intent. Although the manual method or “paper-on-glass” mode which is currently in practice may seem like a viable approach, it presents several challenges such as:
- Time lost in manual cross verification between P&ID and field components
- Inconsistent annotation or mark-up practices by different engineers or teams and prone to human error
- High risk of oversight, misinterpretation, or misconception from handwritten observation
- Difficulty in managing the version control-due to multiple marked-up copies
- Communication and coordination challenges between site and design team for drawing updates
- Lack of digital traceability
- Absence of centralized, searchable data
- Difficult to integrate with other digital application and asset management systems such as systems, applications, and products, computerized maintenance management system, etc.
These limitations highlight the need for improvement through digitalization and the adoption of AI based solutions with human oversight. The goal of digital transformation is not just to digitize the existing documents and/or processes, but to fundamentally improve how organizations operate and deliver value.
Future State
Moving to digital P&IDs is not simply about scanning old drawings or digitizing them. Transitioning to a smart, paperless P&ID walkdown process requires a thorough understanding and fundamental shift in approach, aligned with broader digital transformation objectives such as improved data integrity, traceability, compliance, enhanced productivity, and data-driven decision making.
One effective solution is to assign a unique identifier (UID) technology such as quick response (QR) codes, barcodes, or radio frequency identification (RFID) to each component or asset from the early design stage. Each asset (e.g. valves, instruments, equipment, piping, components) and its associated turnover documentation is assigned a UID, which is linked to the engineering database and integrated with digital verification application(s) including asset management systems, validation document management systems, and 3D modeling/building information modeling (BIM) platforms, so updates flow across all platforms from the design phase and interconnected throughout all phases. This interconnected approach ensures that data and information flow is accurate, connected, consistent, real-time and traceable across every project phase and lifecycle.
Using tablets or smart devices, one can scan the UID in the physical installation and verify the component against interactive P&IDs, allowing a system to automatically confirm its installation status, validate specifications, highlight deviations, generate digital punch lists, and produce summary reports leveraging AI with human oversight. This eliminates the need for manual mark-ups and significantly enhances efficiency and accuracy.
The solution has the following benefits:
- Eliminates paper usage
- Reduces overall execution time and turnaround time
- Accelerates C&Q/verification process
- Facilitates quick retrieval of turnover packages
- Improves traceability and strengthens compliance
- Improves operational excellence
- Act as a platform for digital twins and virtual reality
- Enhances collaboration between site teams; this includes design teams as well as the original equipment manufacturer and engineering, procurement and construction management (EPCM) teams
- Improved asset management
- Improved shop floor visibility and periodic review
- Supports predictive maintenance
P&IDs can serve as foundational documents representing the shop floor on which component assessment and asset management activities are performed. Transforming traditional P&ID into interactive, digital versions and modernizing walkdowns can bridge the gap between field components and digital systems. This shift enables automated verification and ensures that every decision is data-driven, resulting in smarter, more efficient, and more scalable digital execution. Ultimately, digitalizing the P&ID walkdown process can transform static drawings into interactive, intelligent assets that support both current and future digital transformation initiatives.
Conclusion
There is a saying by the philosopher Laozi: “The journey of thousand miles starts with a single step.” P&ID verification is the first critical step for an effective and compliant C&Q lifecycle. Digitalizing P&ID walkdowns is not merely about replacing paper but about setting up the stage for digital maturity and future interoperability prospectus. As organizations move towards integrated, interconnected, risk based, data-driven models, adopting digital P&ID execution represents a significant leap towards smarter, more reliable and more efficient lifecycle and asset management practices that can enhance compliance and operational performance across the value chain.
Which future would you choose: one where maintaining compliance is a constant challenge, or one where compliance is built-in?
