Methodology
PHASES is our structured methodology for improving industrial OT critical infrastructure across its full lifecycle. Each phase builds on the last — from upfront planning and assessment through high and low level design, implementation, and ongoing optimization — to reduce risk, strengthen reliability, and align your network with the needs of production.
For over a decade and hundreds of projects, we have built and evolved PHASES using adapted proven elements of leading planning/execution processes and frameworks like CMM2, Cisco Systems PPDIOO, Project Management Institute (PMI), SEI Carnegie Mellon and others.
While PHASES is a structured and repeatable solution delivery framework, it is adaptive rather than rigid because we have learned well that no two customers are alike.
Critical Infrastructure Demands More Than Technology...
Field Validated Roadmap
Within every phase, Prescher.com has defined a set of critical tasks that are key to project success. Each task acts as essential input and output into neighboring tasks in the same phase and across phases. We are often advised by customers and partners to copyright PHASES but we have also learned, it's not the methodology that counts, it's executing that methodology. That's how we own it.
A Partnering — Not a Transaction
Over decades of project execution I've seen it over and over, technology consultancies engage just long enough to solve an immediate issue or deliver a design… then collect the fee. At that point it's up to the entity to Administer, Operate and Maintenance the solution. For critical infrastructure this approach to solution delivery is not an acceptable approach. In fact its unsound, unsafe.
Knowledge Sharing
Active knowledge-sharing of applied methods required for solutions sustainment is essential to ensure effective operations processes are in place AFTER the engagement is completed.
PHASES Defined
Planning
Industrial OT modernization requires a disciplined planning phase to turn broad executive goals into a realistic project scope that fits within your budget. We focus on bridging the gap between operations, engineering, and security, ensuring all stakeholders are aligned before any work begins. This upfront coordination identifies physical constraints and production risks early, allowing you to move initiatives forward without threatening uptime. By defining clear success metrics and operational requirements at the start, we prevent wasted spend on incorrect hardware and the high costs of mid-project rework. Investing time here protects your bottom line by eliminating emergency projects and ensuring that every dollar spent directly supports the reliability of your critical industrial processes.
Health State Assessment
The Health Assessment phase provides an objective, fact-based audit of your actual current state OT environment to establish a reliable baseline of the communications network . Instead of relying on guesswork, we analyze physical connectivity, application traffic behavior, and device configurations to expose hidden bottlenecks and security vulnerabilities before they trigger an expensive production stoppage. By identifying these operational risks early, we generate a prioritized, realistic action plan that focuses your limited budget on the most critical issues rather than spreading resources too thin across minor problems. This report delivers the evidence-based documentation you need to defend your infrastructure requests and project timelines to leadership. By providing a clear view of where your network stands today, we ensure your remediation efforts are targeted directly at protecting uptime and maximizing the return on every dollar spent.
Architecture HLD Strategy
The Architecture (High Level Design) phase provides a standards-based network blueprint that secures your industrial OT operations before you commit capital to hardware or services. By defining clear network zones and data flows early, we help you avoid the high costs of rework and prevent stranded investments in incompatible equipment. Our approach balances security, performance, and long-term maintainability, allowing you to scale your infrastructure through manageable, phased upgrades. Instead of following a high-risk, all-at-once replacement model that strains tight budgets, this design gives you a predictable path to modernize your environment according to your specific operational needs and financial constraints. By establishing these technical requirements upfront, you can justify every expense and ensure that new systems integrate correctly with legacy equipment, protecting your uptime and your bottom line throughout the entire modernization process.
Specification LLD Design
The Specification (Low Level Design) phase is a critical safeguard for your infrastructure budget. It turns high-level architectural concepts into a comprehensive set of vendor-neutral configurations and precise bills of materials before you sign off on major capital purchases. By detailing every device setting, network segment, and security zone in advance, we eliminate the costly mid-project corrections and surprise add-ons that typically inflate vendor invoices. This detailed technical roadmap significantly reduces integration risk, ensuring new equipment works with your existing OT environment the first time. Having these specifications in hand allows you to compare vendor quotes on an apples-to-apples basis and provides the flexibility to phase installations over time as your budget allows. This practical approach ensures that every dollar spent is a directed investment in a stable, secure network that respects your operational constraints and protects your production schedule.
Execute & Deploy
During the Execute (Deploy) phase, we translate technical designs into a live operational network while strictly protecting your production uptime and budget. We coordinate closely with your operations teams to schedule and plan low-risk cut-overs that fit well planned maintenance windows. Every device configuration and physical installation step is validated against identified safety and performance targets to help achieve the goal of a system working correctly. This disciplined approach avoids the high costs of re-work, turn-up/turn-down, migration outages and emergency overtime and helps reduce repeated re-engagement caused by configuration errors. By executing changes in a controlled, step-by-step manner, we seek to integrate new equipment and software into your environment without causing unexpected downtime or expensive, mid-course corrections. Our priority is to finish the rollout on time and within the original budget, providing you with a stable, high-performance network that meets all industrial requirements from day one.
Support & Sustain
Once your infrastructure is live, our Optimization phase protects your initial investment by ensuring your new or improved network continues to meet performance demands with planned levels of availability and reliability. We focus on active monitoring and configuration tuning to identify and resolve technical issues before they escalate into production outages. This phase is essential to ensure that complex systems entropy is addressed. It also helps to extend the useful life of your existing assets and plan for future upgrades in smaller, more affordable steps rather than high-risk, large-scale replacements. By maintaining a stable and efficient environment, you build a traceable interpretable track record of reliability that demonstrates clear value to operations leadership and owners. Our goal is to keep your data communications driven operations running smoothly, providing the data needed to justify your long-term operation, administration and maintenance strategy and protect your bottom line.