FOA CFOS/D key terms

An early assessment that checks whether a proposed fiber network can be built and operated within budget, schedule, and demand assumptions before major money is committed.

A written statement fixing what the fiber project will and will not deliver, including routes, premises passed, services enabled, and explicit exclusions, so planners and contractors share one baseline.

A hierarchical decomposition of the project into deliverable packages, such as permitting, trenching, splicing, and testing, used to assign owners, estimate effort, and track progress.

The longest chain of dependent activities through the project schedule; any delay on this path pushes out the completion date unless the plan is compressed or resequenced.

The amount of time an activity can slip without delaying the project finish or a successor; activities with zero float sit on the critical path and need close tracking.

A zero-duration checkpoint marking a significant achievement, such as design freeze, permit issuance, or final acceptance, used to report status to sponsors and stakeholders.

A cost and schedule control method comparing planned value, earned value, and actual cost to forecast overruns and schedule slippage on long fiber builds.

A budget reserve held for known risks that are likely but not certain, such as rock excavation or extra permitting, released only through an approved change process.

A living log of identified project risks with likelihood, impact, owner, and mitigation action, reviewed at each status meeting so threats to schedule and budget stay visible.

A formal, approved modification to scope, cost, or schedule after the baseline is set; without it, extra work has no contractual standing and often goes unpaid.

A closing checklist of incomplete or defective items found at walkthrough, tracked until corrected and accepted before the project is formally closed out.

Final drawings and records reflecting what was actually installed, including route changes, splice locations, and depths, handed to the owner for future maintenance and records.

An itemized list of every component needed for the build, with quantities and part numbers, used to price the project, order stock, and reconcile deliveries against design.

Government or property-owner authorization required before construction, covering rights-of-way, road crossings, pole attachments, or building access; approvals often drive the schedule.

The legal corridor, usually public land along roads, in which a network operator is permitted to place conduit, cable, or handholes, subject to conditions set by the authority.

A recorded legal right to cross or use another party's private property for cable placement, negotiated before construction and retained for the life of the network.

Work performed on utility poles, such as replacing or realigning them, so they can safely carry a new attachment; the owning utility sets the cost and timing.

Field inspection of a proposed path recording distances, obstacles, underground utilities, pole conditions, and access points, forming the factual basis for design and cost estimates.

Geographic information system records tying network assets to map coordinates, used for route planning, permitting exhibits, asset management, and outage response.

A calculation summing transmitter power, fiber loss, connector and splice loss, and margin to confirm a span will deliver adequate received power over its full length and lifetime.

The spare loss allowance built into a design to cover aging, repairs, additional splices, and measurement uncertainty so the link still works years after installation.

The loss of optical power as light travels through fiber, expressed in decibels per kilometer and varying with wavelength and fiber type.

A band of wavelengths where fiber loss is low and equipment operates, such as 1310 nm, 1490 nm, or 1550 nm, chosen to match reach and transmission needs.

Combining multiple signals at different wavelengths onto one fiber strand, multiplying capacity without adding cable and requiring filters or multiplexers at each end.

The number of individual strands inside a cable, sized to serve current demand plus growth, sparing policy, and restoration needs rather than only today's subscribers.

A protective plastic tube surrounding one or more fibers inside a cable, keeping strands organized, isolated from moisture, and identifiable for splicing.

A sealed enclosure protecting fused or mechanical splices and slack coil from water, dirt, and physical damage, placed at handholes, aerial spans, or building entries.

Joining two fibers by melting their ends with an electric arc, producing a low-loss permanent connection; splice loss and location must be recorded for the as-built record.

A test instrument that launches light pulses and graphs backscatter and reflections, revealing loss, splice quality, connector condition, and fault distance along a fiber.

A rack-mounted patch panel that terminates incoming fiber cables and cross-connects them to active equipment, keeping central office or headend cabling orderly and testable.

A field cabinet or enclosure where feeder cables terminate and distribution cables branch toward subscribers, providing a point for cross-connection, testing, and service activation.

The high-count cable running from the central office or headend to distribution hubs, carrying aggregated traffic and sized for long-term growth across many serving areas.

The lower-count cable from a distribution hub to access points near subscribers, balancing fiber count against the cost of splices and later activation work.

A small underground access chamber, smaller than a manhole, letting crews pull cable, store slack, and reach splices without entering confined space.

Fiber installed on utility poles and strand rather than underground, usually faster and cheaper to deploy but dependent on pole attachment rights and make-ready work.

Fiber placed in buried conduit, ducts, or direct-buried trenches, offering better protection from weather and damage at the cost of excavation, permitting, and higher upfront expense.

The total allowable loss between transmitter and receiver, derived from launch power minus receiver sensitivity, against which calculated span loss and margin are compared.

Deliberate duplication of routes, equipment, or fiber paths so a single failure does not interrupt service, planned through ring topologies or alternate paths and paid for in cost.

Physically separating primary and backup paths so one dig-up, fire, or flood cannot cut both, verified on maps rather than assumed from logical diagrams.

The process and time target for returning service after a fiber cut, supported by spare fibers, documented splice records, and pre-planned alternate routes.