Process plants means power plants, refineries, industrial facilities. The complexity of these projects calls for a systematic approach if schedule and budget are to hold. Lean management has established itself for exactly that. This article shows what it delivers in the four phases of engineering, procurement, manufacturing and construction.
Lean in engineering: flow, takt and modularisation in design
The engineering phase sets the structure of the project. Flow and takt make the planning processes more efficient and save time and cost.
Flow means that planning processes run continuously, without unnecessary delays or waiting times. That requires identifying and removing bottlenecks, and clear communication between departments and teams. The basis is a plan that takes every relevant input into account.
Takt is the time-based alignment of those processes. Tasks run in a logical sequence and within a defined time, and the available working time is distributed evenly across the tasks. The takt has to be reviewed regularly and adjusted to the course of the project.
Modularisation divides the project into smaller, standardised modules that are planned and developed independently of each other. It brings four benefits:
- Reduced complexity: individual modules are easier to handle than the whole project, so planning and execution become simpler.
- Flexibility: when changes or unforeseen events occur, individual modules can be adjusted or swapped without affecting the whole project.
- Scalability: projects can be expanded or scaled down by adding or removing modules.
- Efficient resource use: because modules are developed independently, resources can be deployed more deliberately and bottlenecks avoided.
Together, flow, takt and modularisation raise planning certainty and lower cost.
Lean in procurement: standardisation and modularisation
Modularisation in engineering feeds directly into procurement. Standardised components allow closer supplier partnerships and shorter lead times. Less inventory has to be held on site, logistics become simpler, the supply chain more transparent. Suppliers can also specialise in producing standardised modules. That secures quality and reduces dependence on individual suppliers.
Lean in manufacturing: large modules
In the manufacturing phase, the largest efficiency gains come from building large modules. They can be built in parallel, in sequence and independently of one another, which makes better use of production capacity. Sequenced manufacturing on a “just-in-sequence” basis shortens the lead time of manufacturing, of installation and therefore of the whole project.
Standardised modules are produced in a repeatable, consistent way and can be inspected in short cycles. Quality is held throughout the manufacturing process. Standardisation also makes collaboration with suppliers and partners easier, because everyone works to the same standards.
Lean in the build phase: modularisation, flow and takt in execution
The large modules prefabricated in the manufacturing phase only need to be put together on site. That shortens assembly time, reduces errors and safety risks, and deploys labour more efficiently.
Flow in construction means no unnecessary delays, waiting times or bottlenecks. All trades and resources are coordinated and synchronised, with clear communication, structured planning and regular monitoring of construction progress.
Takt in the build phase means the trades work in a logical sequence and within fixed time windows. Every participant knows when, and for how long, they are responsible for their tasks. Conflicts and schedule overlaps are identified early, and construction delays become rarer.
Summary
Modularisation works in all four phases. In engineering it simplifies planning, in procurement it standardises sourcing, in manufacturing it allows the sequenced production of large modules with better utilisation and shorter lead times, and in the build phase, together with flow and takt, it produces coordinated execution. Companies that apply these principles and keep developing them hold schedule and budget more reliably, raise customer satisfaction and strengthen their competitiveness.