Architect
A nature view needs 35 per cent greenery to lift satisfaction
When the value engineering round opens and the glazing spec is first in line to be cut, you defend a nature view only by naming the effect figure that justifies it.
A worksheet applies scientific analysis to your daily work. It shows what you need: numbers, thresholds, sources and how to put them to work.
Architect
When the value engineering round opens and the glazing spec is first in line to be cut, you defend a nature view only by naming the effect figure that justifies it.
Architect
The circadian target is 200 EML by day at 75 per cent or more of workstations, measured vertically at eye level (WELL v1).
Architect
Wargocki and colleagues recorded roughly 20 per cent higher task performance at 20 °C than at 30 °C: a stated performance loss like that is what keeps a cooling setpoint off the cut list.
Architect
A daylight specification clears the value engineering cut only when its benefit is stated as a number, such as an sDA of 300 lx over 50 per cent of the plane, that a client can weigh against the cost of the glazing or the shading system.
Architect
A lighting line clears value engineering only when its benefit names a number, such as 500 lx or a UGR of 19, and cites a standard.
Architect
Lohr and colleagues recorded 12 per cent quicker reaction times when plants entered a room. Budget owners strike planting lines that lack a number like that.
Architect
The ventilation specification survives the value engineering round when a client can weigh a number for the benefit against the saving.
Architect
In the value engineering round, a quantity surveyor keeps an acoustic specification only when it states a measurable target, such as ISO 3382-3's D2,S of 7 dB.
Architect
In the value engineering round, only a specification that states a citable effect and a measurable target value stays on the cut list.
Asset manager
Daylight quality feeds the asset-value case through a chain from measured performance to rent premium to exit value, but the premium your building trades on is a label average that says nothing about which single measure earned it.
Asset manager
A lighting spec feeds the certification score that the market prices your building on, whether or not any single measure earned the premium.
Asset manager
A certification premium prices the whole label into rent and exit value, but it never tells you which single measure inside the building earned it.
Asset manager
A certification premium prices your building on a category average, and no line in that average tells you whether the plants or the water feature earned it.
Asset manager
Acoustic performance feeds the quality-to-rent-premium-to-exit-value chain the owner underwrites, yet the market prices it through a label average that says nothing about which measure earned it.
Asset manager
Certification is tied to a rent premium in the exit price on average, so the lighting spend is priced whether or not any single measure earned it.
Asset manager
Temperature set points sit inside the certification your building is priced on, yet the rent premium attached to the label is a category average that says nothing about whether this one measure earned it.
Asset manager
Acoustic performance sits inside the certification premium the market already prices into your asset, yet the label average tells you nothing about whether any single acoustic measure earned it.
Asset manager
A certification's rent premium prices your building on a category average, so the ventilation spend that earns the label is only as defensible as the standard you require against it.
Corporate real estate manager
Cutting CO₂ from 2,100 ppm to 900 ppm predicts a 12 per cent gain in work speed.
Corporate real estate manager
Lighting specification is a staff-cost decision, since staff cost runs 100 to 200 times a building's energy cost in a 2006 REHVA guidebook.
Corporate real estate manager
Lighting specifications sit inside the lease and fit-out decisions you sign off, and they act on salaries, which Terrapin Bright Green (2012) put at 90.3 per cent of a US office's cost per square foot.
Corporate real estate manager
Verbal short-term memory begins to fall at a speech transmission index of 0.21 to 0.44, on a staff bill that a 2006 REHVA guidebook puts at 100 to 200 times the energy bill.
Corporate real estate manager
Indoor plants lower blood pressure and quicken reaction times in controlled settings; the field trials that would turn this into a productivity line per head came back null.
Corporate real estate manager
Optimised daylight and views came with 37 minutes more sleep and 42 per cent higher cognitive scores, and a 2006 REHVA guidebook puts staff cost at 100 to 200 times a building's energy cost.
Corporate real estate manager
Terrapin Bright Green (2012) put US office salaries at about ten times rent, which makes overheard speech in an open-plan office a question for the cost committee.
Corporate real estate manager
Lan and colleagues (2021) measured cognitive performance 6 to 10 per cent lower at 26 °C and 28 °C than at 24 °C, and by a 2006 REHVA ratio each per cent of it is worth the whole energy bill or more.
Corporate real estate manager
Boubekri and colleagues measured 37 minutes more sleep and cognitive-simulation scores 42 per cent higher in a combined daylight and views condition, and no supplied study prices the glazing and lighting that would deliver it.
Developer and investor
Air quality reaches your rent roll only through the people who occupy the space, and only the first step of that chain is graded strong.
Developer and investor
Acoustic quality reaches your rent roll only through the people in the building and only the first step of that chain is graded strong.
Developer and investor
Lighting quality only reaches your rent roll through the people who occupy the space, and only the first link of that chain is backed by evidence you can underwrite.
Developer and investor
The acoustic spend on a guest room reaches your pro forma only through rate, occupancy and review scores, and only the first link of that chain is evidenced.
Developer and investor
Turan and colleagues put a 5 to 6 per cent value premium on Manhattan offices above 55 per cent daylight autonomy; what that premium means for one building's rent stays open.
Developer and investor
The room temperature you set and the humidity you hold reach your ADR and RevPAR only through the guest's body, and only the first link of that chain is measured.
Developer and investor
Balneotherapy and sauna use reduce measured stress and fatigue with effect sizes from 0.8 to 2.3 against no treatment, but no supplied evidence ties that guest-level change to a room rate, an occupancy point or a spa's payback.
Developer and investor
A standard-deviation rise in PM2.5 means 0.55 fewer hours of sleep for the guest; the step from there to rate and occupancy is not yet evidenced.
Developer and investor
Acoustic quality reaches your rent roll only through the people in the building, and only the first step of that chain is backed by strong evidence.
Developer and investor
Circadian lighting reaches a building's income only through the people inside it, and only the first step of that chain is graded strong.
Developer and investor
Nature views change measurable outcomes in people; the link from there to rent stays a category average, not a per-building figure.
Developer and investor
Indoor plants change measurable outcomes in people; the link from there to rent stays a category average, not a per-building figure.
Developer and investor
Temperature control moves cognitive performance in occupants; whether it moves rent, yield or one building's revenue is a far weaker claim.
HR manager
You answer for how the open-plan floor affects your people, but the acoustic fit-out is funded from a budget you do not control, and your satisfaction score misses the 2 per cent absenteeism drop and other performance effects documented below.
HR manager
Berman and colleagues validated attention restoration on a backwards digit-span task, and cognitive control is rated strong; on retention there is one study, and it dates from 1998.
HR manager
You own how the space affects your people yet not the lighting budget, so you need a number ready for when the CFO asks what a lux target buys.
HR manager
The measured gains are sleep and mood: Boubekri and colleagues recorded 37 minutes more sleep under optimised daylight; on daytime alertness Grant reported a gain in 2021 and Schöllhorn found none in 2023.
HR manager
Workers in an optimised daylight and views condition slept 37 minutes longer and scored 42 per cent higher on higher-order decision tasks. You own that effect on your people, whatever the fit-out budget it takes to capture it.
HR manager
You own how the office affects your people. Facilities and finance set the ventilation budget, and the effect on your people is what you answer for. This sheet gives you the figure to raise with them.
HR manager
You own the effect of the workplace on people yet not the fit-out budget, and the plant line is the one a CFO can check against a number.
HR manager
The acoustic complaints in your survey trace to intelligible speech at nearby desks, and the evidence base is strong enough to defend a fit-out line before the CFO.
HR manager
You answer for how the workplace affects your people, but facilities sets the thermostat and finance signs off the fit-out budget.
Marketing manager
A compliance reviewer signs off on the lighting claim on your exposé only when it names the WELL v1 or EN 12464-1 threshold behind it and stops short of promising sleep, mood or alertness gains for the tenant.
Marketing manager
For the real estate marketing lead: a nature-view study measured 37 extra minutes of sleep under one tested condition, and this worksheet sets the boundary an exposé sentence must keep to pass an advertising review.
Marketing manager
NC 30, about 35 dBA, is a claim a reviewer can check on the finished floor, and that measured figure is the one a compliance sign-off verifies.
Marketing manager
A lighting claim clears compliance review when it names a standard's own number, such as 500 lx maintained or a UGR of 19; a health or productivity promise has no such number to check.
Marketing manager
A daylight claim only sells if it passes compliance sign-off, so the checkable sentence is what a compliance reviewer verifies.
Marketing manager
Compliance sign-off tests every claim about greenery or water. The evidenced sentence is the one that passes.
Marketing manager
EN 16798-1 sets the Category II comfort band at 20.0 to 24.0 °C heating and 23.0 to 26.0 °C cooling, the number an advertising review checks a temperature claim against.
Marketing manager
The air quality claim a compliance officer can sign off on is the one you can measure and cite, and this sheet gives you that sentence before the copy goes to the owner.
Marketing manager
A measured claim, such as a decay rate or an STI value, sells the acoustic fit-out, because a surveyor can check it against a published standard, and no standard exists for 'comfort' or 'wellbeing'.
Workplace strategist
Background noise crosses a measured threshold at STI 0.21 and peaks at STI 0.44, a citable performance loss you can defend line by line in a capex paper.
Workplace strategist
Circadian lighting has moderate evidence for mood and for sleep, enough for a capex paper that books both at that grade. Daytime alertness does not reach that threshold.
Workplace strategist
Daylight's effect sizes, a 37-minute sleep gain and a 42 per cent cognition gain, are large enough to defend in a capex paper, and Schöllhorn's null on alertness names the exact limit.
Workplace strategist
Greenery earns a line in the fit-out budget on cognitive and physiological grounds, but the field measurements will not carry the productivity claim you want to put in front of finance.
Workplace strategist
Illuminance has hard standards behind it, so a lighting line comes with figures a finance committee can verify.
Workplace strategist
Boubekri and colleagues measured 37 more minutes of sleep and a 42 per cent gain on cognitive scores: a capex paper defends that figure only by naming the author and the limit a finance committee will probe first.
Workplace strategist
A temperature shift is worth a 6 to 20 per cent swing in cognitive performance. Error rate and academic performance are rated strong, enough for a capex case built on the EN 16798-1 band.
Workplace strategist
A finance committee approves acoustic capex only when the speech intelligibility figures behind it trace to a named study and a stated threshold.
Workplace strategist
Ventilation raises information-processing performance by 1.7 to 7.4 per cent, an effect size specific enough for a line in a capex paper.
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