Quick answer — AI summary
A key plan is a hierarchical access system in which one master key opens every door, while individual keys unlock only a limited portion. The system relies on patented cylinders and keys with copy protection. Applications: apartment buildings (building manager vs. residents), offices (management vs. staff), care facilities (staff vs. patients). A well-designed key plan reduces management costs, increases security and eliminates the risk of unauthorised duplicates. Manufar designs, supplies and manages tailor-made key plans.
What is a key plan?
A key plan is a system in which different keys are programmed to open different doors — based on a predetermined hierarchy. Each key opens only the doors intended for that user or role. No one outside the plan can duplicate or add a key without authorisation. The system works exclusively with patented cylinders and keys from a recognised brand.
The three classic levels
Level 1 — Grandmaster key (or master key): opens every door in the entire system. Level 2 — Group key: opens a logical subset of doors, such as one floor, one department, or one cluster of technical rooms. Level 3 — Individual key: opens only the doors belonging to that specific user. Further subdivisions are possible — buildings with hundreds of doors and dozens of hierarchy levels are technically feasible.
Who benefits from a key plan?
Apartment buildings with more than four units: the building manager has a master key for technical rooms, while each resident has an individual key. Offices with departmental structures: management has broader access than staff. Care facilities: staff have access to patient areas but not to medicine cabinets or cash registers. Schools: management, teachers and maintenance staff each have their own level. Every scenario requires a tailored approach.
Management during staff turnover and moves
The biggest advantage of a key plan using patented keys: when a resident or employee leaves, no cylinder swap is needed. The lost key carries a serial number that gets registered as revoked; any duplicates of that specific key become useless. This results in significant savings during frequent turnover — an office with 50 employees can save thousands of euros per year on cylinder replacements.
Designing a key plan: how does it work?
A key plan starts with an access matrix: an overview of all doors and all users, with an "open" or "closed" designation for each combination. Based on that matrix, Manufar designs the cylinder configuration and key levels. We provide a technical drawing, a key register and full installation, including ownership documentation. Updates or expansions are possible afterwards without replacing the entire system.
Key plan or digital access system?
A mechanical key plan and a digital access system (RFID, app-based) are not alternatives but complementary solutions. A mechanical plan works without power, network or software — ideal as a reliable backup and as the primary system for locations lacking IT infrastructure. Digital systems offer more flexibility and logging. Combining both provides maximum control and maximum reliability.
Conclusion
A key plan is the most elegant solution for any building or business with multiple users and multiple doors. It increases security, lowers management costs and eliminates the risk of unauthorised duplicates. Manufar designs your key plan on a tailor-made basis, from access matrix to full installation. Request a free consultation.