Sectors

Project types we review.

Every project type has its own places where the drawings, specifications, contracts, and trade scopes split. Scope and fit for each review are set in a written proposal.

Photographs are licensed from Wikimedia Commons and do not show ChangeGuard projects. Photo credits

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Hospitals and healthcare

Hospital projects often add an equipment planner's matrix and an infection control risk assessment to the drawings and specifications, and each describes the same work in its own terms.

A hospital patient room with a bed and overbed table, a headwall with outlets and a suction canister, a ceiling curtain track, a wood wardrobe, and a monitor on a rolling stand — Not a ChangeGuard project. Photo: Anastasia Puscian, U.S. Navy, public domain.

Where scope commonly splits

Owner-furnished equipment rough-ins: The equipment planner's responsibility matrix can assign imaging and sterilizer rough-ins to the contractor while the MEP drawings and Division 11 sections mark them by owner or leave them out.
Medical gas outlets and zone valves: Outlet counts on the headwall elevations and room data sheets can differ from the medical gas piping plans, and the zone valves on the plans from the zone valve box schedule.
Infection-control barriers and phasing: The infection control risk assessment can call for anterooms, hard barriers, and HEPA-filtered negative air that the phasing drawings and trade scope sheets do not carry.

Documents where these splits sit

Equipment planner's responsibility matrix
Room data sheets and headwall elevations
MEP drawings, including medical gas plans and zone valve schedule
Division 11 sections and imaging vendor site drawings
Infection control risk assessment and phasing drawings
Trade scope sheets

Where it shows up

This shows up at buyout, when each equipment connection and infection-control requirement has to land in exactly one scope while the matrix and the drawings still disagree.

Life sciences and labs

In lab buildings, the lab planner's furnish scope meets the MEP design at fume hoods, casework, and service fittings, where responsibility changes hands.

A laboratory bench with shelves of reagent bottles and glassware, service fittings along its back, base cabinets below, a fume hood at the left, and a lab stool — Not a ChangeGuard project. Photo: Magnus Manske, CC BY 1.0.

Where scope commonly splits

Fume hood monitors and airflow controls: The fume hood section can have the hood manufacturer furnish airflow monitors and sash sensors while the mechanical drawings and controls sequence assign them to the controls contractor.
Service fitting final connections: The laboratory casework section can have the casework supplier furnish and mount service fittings while the plumbing and process piping drawings and the plumbing scope sheet leave final connections unassigned.
Owner-furnished lab equipment utilities: The lab planner's equipment matrix can list hard-ducted biosafety cabinets and autoclave steam and drains while the mechanical and plumbing drawings show canopy exhaust or leave the connections out.

Documents where these splits sit

Lab planner's equipment matrix and room data sheets
Laboratory casework and fume hood specification sections
Casework elevations and service fitting schedules
Mechanical, plumbing, and process piping drawings
Controls sequence of operations
Trade scope sheets

Where it shows up

It surfaces at award, because the casework, mechanical, plumbing, and controls subcontracts can each be written from a different account of who furnishes and who connects.

Industrial and manufacturing

Manufacturing buildings carry two designs at once, building and process, and the scope line between them is drawn in different documents by different engineers.

A long manufacturing hall under steel roof trusses and rows of lights, with a production line in the foreground, worktables, and stacked window frames at the far end — Not a ChangeGuard project. Photo: Shixart1985, CC BY 2.0.

Where scope commonly splits

Process utility tie-in points: The process P&IDs and tie-in list can set battery limits for compressed air, process water, and exhaust at tie-in points the building mechanical and plumbing drawings place elsewhere or leave out.
Equipment pads, pits, and anchor bolts: Certified vendor drawings and foundation load data can call for pads, pits, and anchor bolts that the structural foundation plans and concrete scope sheet leave out or size for an earlier equipment selection.
Setting owner-furnished process equipment: The owner's equipment responsibility matrix can assign rigging, setting, grouting, and power connections to the contractor while the electrical drawings and millwright scope sheet leave them to the vendor.

Documents where these splits sit

Process P&IDs and tie-in list
Certified vendor drawings and equipment data sheets
Owner's equipment list and responsibility matrix
Structural and building MEP drawings
Division 01 summary of work
Millwright, concrete, and electrical scope sheets

Where it shows up

It can come back in change review, because pads, embeds, and tie-ins that no subcontract carried can surface as change requests when certified vendor drawings arrive after buyout.

Athletic and sports venues

Venues bring specialty vendors for scoreboards, sports lighting, and seating into a base-building design that has to carry their weight, power, and data.

Rows of gray stadium seats on steep concrete risers, with steel railings, under the roof of the stand — Not a ChangeGuard project. Photo: Mattes, public domain.

Where scope commonly splits

Video board steel, power, and fiber: The video board specification can assign support steel, power, and fiber pathways to the base building while the structural, electrical, and low-voltage drawings mark them by the board vendor.
Sports lighting poles, bases, and controls: The sports lighting specification can have the vendor furnish poles, precast bases, and control cabinets that the site electrical plans and foundation details also carry as trade work.
Seating layout and riser geometry: The seating manufacturer's layout and anchorage details can call for seat counts, wheelchair spaces, tread depths, and embeds that the architectural seating plans and precast riser drawings show differently.

Documents where these splits sit

Specialty vendor specifications and delegated-design criteria
Seating manufacturer layouts and architectural seating plans
Structural steel and riser drawings
Electrical one-line diagrams and site electrical plans
Low-voltage and broadcast cabling drawings
Trade scope sheets

Where it shows up

It surfaces at award, because specialty vendor contracts and base-building subcontracts are written side by side, and either side can assume the other carries the steel, power, and pathways.

Multifamily and mixed-use

Multifamily sets repeat unit types across many floors, so a mismatch between plans, schedules, and assembly details repeats wherever that unit or wall type does.

A large wood-framed building under construction, with sheathed walls, open window openings, roof trusses being set, and a timber-framed entry gable, against a forested hillside — Not a ChangeGuard project. Photo: Marek Ślusarczyk (Tupungato), CC BY 3.0.

Where scope commonly splits

Unit plans against appliance schedules: Enlarged unit plans can show appliances, sinks, and washer-dryer locations that the appliance schedule and unit matrix assign to a different unit type or leave out.
Plumbing stacks at the podium transfer: The plumbing plans can offset stacks at the podium where the transfer slab's post-tensioning layout and penetration details make no allowance for them, and the architectural sections align the walls above differently.
Rated and acoustic partition types: The partition type schedule can carry fire ratings and STC values that the life safety plans, rated assembly details, and gypsum board specification section describe differently.

Documents where these splits sit

Enlarged unit plans and unit matrix
Finish, appliance, and plumbing fixture schedules
Partition types, rated assembly details, and life safety plans
Podium drawings, post-tensioning layout, and penetration details
Plumbing plans and riser diagrams
Specification sections and trade scope sheets

Where it shows up

This shows up at buyout, because unit counts and assembly types set quantities in the drywall, finish, and appliance packages, so one schedule mismatch can carry into several of them.

Commercial office and interiors

Interior fit-outs sit inside someone else's building, so the lease, the landlord's rules, and the tenant drawings each claim part of the scope.

An open office with blue-gray sofas around a low table, desks and chairs by tall windows, pendant bulbs, and translucent partition walls framed in wood — Not a ChangeGuard project. Photo: Loominade, CC0 1.0.

Where scope commonly splits

Landlord work versus tenant work: The landlord work letter can assign ceiling grid, restroom upgrades, and sprinkler head relocation to the landlord while the tenant drawings and bid form carry them as tenant work.
Landlord-required fire alarm and building controls vendors: The tenant electrical and mechanical drawings and scope sheets can carry fire alarm and building controls work while the landlord's building rules require the building's designated vendors for those systems.
Furniture and AV vendor requirements: Furniture and AV vendor layouts can call for power feeds and data drops the tenant electrical plans and low-voltage scope sheet do not show, and in-wall display blocking the interior elevations and framing scope sheet do not carry.

Documents where these splits sit

Lease exhibit and landlord work letter
Landlord building standards and rules for contractors
Tenant architectural, MEP, and fire protection drawings
Existing-conditions and base-building drawings
Furniture, technology, and AV vendor layouts
Bid form and trade scope sheets

Where it shows up

It lands in the bid, because the tenant-improvement price has to state which work letter items it carries, which it leaves to the landlord, and which go to designated vendors.

K-12 and higher education

School and campus projects often add owner standards, a formal bid form, and calendar-driven phasing to the drawings and specifications, and the owner's documents may not agree with the design team's.

A classroom with rows of wooden student desks and chairs, wood storage cabinets along the wall, and computers on a side counter — Not a ChangeGuard project. Photo: Leo-setä, CC BY 2.0.

Where scope commonly splits

Owner standards versus project specifications: District or campus design standards can name keying, building automation, and fire alarm manufacturers that the project specification sections list differently or open to substitution.
Bid-form alternate boundaries: The bid form can describe add and deduct alternates whose limits the Division 01 alternates section and the alternate notes on the drawings draw in different places.
Work windows around the academic calendar: Summer and break-period work windows in the Division 01 phasing requirements can differ from the phasing drawings' area sequence and the work hours assumed in trade scope sheets.

Documents where these splits sit

Bid form with alternates and unit prices
District or campus design standards
Division 01 alternates, phasing, and summary of work sections
Phasing and logistics drawings
Project specification sections
Addenda

Where it shows up

It lands in the bid, since publicly bid school work is priced on a fixed bid form where an alternate read two ways can change the apparent low bidder.

Data centers and mission-critical facilities

Data center owners often buy generators, switchgear, and cooling units directly, so vendor scope, trade scope, and commissioning scope meet at the owner-purchased equipment.

A data center aisle between rows of black server cabinets, under a ladder cable tray full of blue cables and a yellow fiber raceway — Not a ChangeGuard project. Photo: Rubin Observatory/NSF/AURA, CC BY 4.0.

Where scope commonly splits

Setting and starting owner-purchased gear: Owner purchase orders and the equipment responsibility matrix can end vendor scope at delivery while the electrical specification has the vendor rig, set, and start up generators and switchgear.
Load banks, fuel, and integrated testing: The commissioning plan can assign load banks, test fuel, and integrated systems testing support to the contractor while the generator specification section assigns them to the vendor or owner.
Vendor data against one-lines and piping: Vendor data for owner-purchased switchgear and cooling units can show breaker sizes, lug configurations, and piping connections that differ from the one-line diagram, feeder schedule, and mechanical piping drawings.

Documents where these splits sit

Owner purchase orders, vendor scope letters, and equipment responsibility matrix
Electrical and generator specification sections
One-line diagrams, feeder schedules, and mechanical piping drawings
Vendor submittal and connection data
Commissioning plan and commissioning specification sections
Trade scope sheets

Where it shows up

It can come back in change review, because startup, testing, and connection work left between vendor purchase orders and trade subcontracts can return as change requests near energization.

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Photo credits

Each picture on this page and on the home page is a photograph from Wikimedia Commons, and each credit says how we changed it. None shows a ChangeGuard project.

Hospitals and healthcare Photo by Anastasia Puscian, U.S. Navy, public domain, via Wikimedia Commons. Cropped, resized, exposure lifted slightly, and a small maker's mark softened.
Life sciences and labs “Lab bench” by Magnus Manske, CC BY 1.0, via Wikimedia Commons. Cropped, resized, and a small maker's mark softened.
Industrial and manufacturing “Industrial production line operating in a large modern factory” by Shixart1985, CC BY 2.0, via Wikimedia Commons. Cropped and resized.
Athletic and sports venues Photo by Mattes, public domain, via Wikimedia Commons. Cropped and resized.
Multifamily and mixed-use “25 Wood frame condominium construction in Canada - apartment building construction in Fernie, British Columbia” by Marek Ślusarczyk (Tupungato), CC BY 3.0, via Wikimedia Commons. Cropped and resized.
Commercial office and interiors Photo by Loominade, CC0 1.0, via Wikimedia Commons. Cropped and resized.
K-12 and higher education “Elementary school classroom in Vantaankoski school in Vantaa, Finland, 2010” by Leo-setä, CC BY 2.0, via Wikimedia Commons. Cropped and resized.
Data centers and mission-critical facilities “Summit Computer Room Installation (rubin-2018-05-02-192415)” by Rubin Observatory/NSF/AURA, CC BY 4.0, via Wikimedia Commons. Cropped, resized, and exposure lifted slightly.