diff --git a/2025-12-10.md b/2025-12-10.md index ded5de8..2442e24 100644 --- a/2025-12-10.md +++ b/2025-12-10.md @@ -14,12 +14,16 @@ tags: #occupational/takeoff #topic/ambiguity #topic/transparency +Related: [[lighting-controls-takeoff]] + ### Minutes 2025-12-10 08:30--10:00 Objective: Discuss lighting control systems +*** + A primary reason for the discussion was presented: > [!example] ^ex @@ -31,6 +35,8 @@ A primary reason for the discussion was presented: > When the project team received a quote for a "per code" system, > the total was ~$600,000. +*** + Ultimately the responsibility is ConEst's to resolve discrepancies between: * applicable code @@ -38,6 +44,8 @@ to resolve discrepancies between: * Bid proposal intent * PDR quote intent +*** + It was erroneously suggested that lighting control conductors may be run with their circuit conductors if both are 600V insulated.[^1] diff --git a/actuarial-science-for-construction-estimating.md b/actuarial-science-for-construction-estimating.md index 2e386dc..ca04ae9 100644 --- a/actuarial-science-for-construction-estimating.md +++ b/actuarial-science-for-construction-estimating.md @@ -18,4 +18,7 @@ However, for construction projects, **return** is known but **cost** must be estimated. In this way, projects are better compared to _insurance accounts_. +- cost of individual service is uncertain +- cost to customer must be minimized + [[actuarial-science]] diff --git a/consolidate-estimating-thoughts.md b/consolidate-estimating-thoughts.md index 5a5d27c..fb6a024 100644 --- a/consolidate-estimating-thoughts.md +++ b/consolidate-estimating-thoughts.md @@ -23,6 +23,8 @@ are currently disparate, disjointed, and redundant ### Naming Conventions (Use Case vs. Description) +Related: [[realism-vs-instrumentalism]] + Naming by use case is intuitive for those without estimating or field experience, but has the side effect that those accustomed to the names will inevitably _treat them as descriptive_. diff --git a/construction-estimating.md b/construction-estimating.md index 371e67a..edce126 100644 --- a/construction-estimating.md +++ b/construction-estimating.md @@ -47,11 +47,12 @@ that errors aren't set in stone until a contract is signed. Destigmatizing proposal retraction is of critical concern for subcontractors. -See [[estimating-culture]] for more on estimate error [[strategy#Game Theory]]. +See [[estimating-culture]] for more on estimate error [[game-theory]]. It's important to recognize that retracting a proposal may upset a few people employed by the GC, -but consider how little your own opinion matters to your company's strategic decisions. +but consider how little your own opinion +matters to your company's strategic decisions. Much bigger people are involved after the proposal is accepted. ## Resources diff --git a/estimating-ethics.md b/estimating-ethics.md index 8665f22..170206b 100644 --- a/estimating-ethics.md +++ b/estimating-ethics.md @@ -12,8 +12,10 @@ title: Estimating Ethics --- # Estimating Ethics -Clients engaging in unethical bidding practices can quickly gain a reputation for doing so, -leading to reduced bid response that can be impossible to fully recover from. +Contractors engaging in unethical bidding practices +can quickly gain a reputation for doing so, +leading to reduced bid response +that can be impossible to fully recover from. To ensure a transparent bidding process, one must diff --git a/fixtures-takeoff.md b/fixtures-takeoff.md index 6839b69..74f0b30 100644 --- a/fixtures-takeoff.md +++ b/fixtures-takeoff.md @@ -12,29 +12,11 @@ title: Fixtures Takeoff # Fixtures Takeoff This system is only for luminaires and their immediate branch wiring. -See also [[lighting-controls]] and [[electrical]]. - -## Info +See also [[lighting-controls-takeoff]] and [[electrical-takeoff]]. ## Sequence -### 1. Preparation - -1. Read about the project specifications and construction type -2. In drawings, locate: - * Fixture Schedule - * Reflected Ceiling Plans - -### 2. Takeoff - See [[fixture-designations]]. 1. Takeoff floor plans in order 2. Takeoff enlarged drawings - -### 3. Review - -1. Garage Homeruns -2. Luminaire in Amenity Areas -3. Ensure appropriate breakdowns - * Site lighting in System "FML - Site Fixtures Material & Labor" diff --git a/hvac-calculations.md b/hvac-calculations.md index 4b4eecc..cc4533c 100644 --- a/hvac-calculations.md +++ b/hvac-calculations.md @@ -23,8 +23,8 @@ abbreviated BtuIT $$ \begin{align*} -1 \text{Btu}_\text{IT} &= \left( 4.1868 \times 453.59237 \times{\frac{5}{9}} \right) \text{J} \\ -&\approx 1055.056 \text{J} +1 \text{Btu}_\text{IT} &= \left( 4.1868 \times 453.59237 \times{\frac{5}{9}} \right)~\text{J} \\ +&\approx 1055.056~\text{J} \end{align*} $$ @@ -34,8 +34,8 @@ a unit of power. $$ \begin{align*} -1 \text{MBH} &= 1000 \text{Btu/hr} \\ -&\approx 3.412 \text{W} +1 \text{MBH} &= 1000~\text{Btu/hr} \\ +&\approx 3.412~\text{W} \end{align*} $$ @@ -49,8 +49,8 @@ Unit of power $$ \begin{align*} -1 \text{TR} &= 12000 \text{Btu}_\text{IT}/\text{h} \\ -&\approx 3516.853 \text{W} +1 \text{TR} &= 12000~\text{Btu}_\text{IT}/\text{h} \\ +&\approx 3516.853~\text{W} \end{align*} $$ @@ -62,8 +62,6 @@ Unit of volumetric flow ### Airflow -* CFM - External static pressure (ESP) measured in inches of water @@ -72,23 +70,23 @@ measured in inches of water * Tons (refrigeration) * MBH -Entering air temperature (EAT) -Leaving air temperature (LAT) -Mixed air temperature (MAT) +* Entering air temperature (EAT) +* Leaving air temperature (LAT) +* Mixed air temperature (MAT) -Latent heat -Sensible heat +* Latent heat +* Sensible heat -Sensible -> dry bulb -Latent -> wet bulb +* Sensible -> dry bulb +* Latent -> wet bulb #### ??? -OSA EAT (F) -EXH EAT (F) +* OSA EAT (F) +* EXH EAT (F) -IN S.L. -OUT ALT. +* IN S.L. +* OUT ALT. ### Efficiency diff --git a/lighting-controls-takeoff.md b/lighting-controls-takeoff.md index 257dc95..c8c35ce 100644 --- a/lighting-controls-takeoff.md +++ b/lighting-controls-takeoff.md @@ -17,7 +17,7 @@ title: Lighting Controls Takeoff > [!info] "Local Control" as a PDI proposal qualification > The term "local control only" is sometimes used to indicate > no consideration for _any_ lighting control beyond standard devices, -> (with `$D`'s being the triac type) +> (with `$D`'s being the [[lighting-controls#Triac Dimming|triac]] type) > however, this phrasing is ambiguous and non-universal. > Confirm with [[pdi-estimating#Bid Estimating|bid team]] on what must be included. @@ -31,7 +31,7 @@ Determine which Systems and Codes are required: ### Stand Alone -0-10V dim -- "LV cable" is 2 conductor +0-10V dim --- "LV cable" is 2 conductor Takeoff rough-in for switches and occupancy sensors * **Branch Length** = length of room diff --git a/pre-takeoff-research.md b/pre-takeoff-research.md index 1a6a174..6c0196d 100644 --- a/pre-takeoff-research.md +++ b/pre-takeoff-research.md @@ -100,6 +100,13 @@ Locate: 1. Locate Equipment Schedules +### Fixtures + +1. Read about the project specifications and construction type +2. In drawings, locate: + * Fixture Schedule + * Reflected Ceiling Plans + ### Low Voltage 1. Locate Proposal/Scope of Work. Determine ownership and takeoff responsibility: diff --git a/risk-oriented-estimating.md b/risk-oriented-estimating.md index 2c809ea..80db0f4 100644 --- a/risk-oriented-estimating.md +++ b/risk-oriented-estimating.md @@ -21,7 +21,7 @@ for [[construction-estimating]] which: * determines necessary [[estimating-detail]] ROE leans heavily on [[uncertainty#Value of Information]], -which challenges the natural tendency to shy from uncertainty +which challenges the natural tendency to fear even the smallest risk with the reality of the **cost of certainty**. ROE does not endorse common shortcuts that round up to "cover" uncertainty, @@ -32,19 +32,8 @@ increasing the probability of loss to a competitor. ## TALK -Despite how alien my approach may seem to most estimators, -I believe its all merely extrapolation on the conventional practice. - -ROE includes fields far more disparate -than my peers would traditionally consider relevant. - -Bid risk may fit a [Taleb distribution](https://en.wikipedia.org/wiki/Taleb_distribution). - -[Actuarial Science](https://en.wikipedia.org/wiki/Actuarial_science) -strongly parallels construction estimation: - -- cost of individual service is uncertain -- cost to customer must be minimized +This note currently gets too far into the weeds +of critiquing common practice. %% @@ -83,9 +72,7 @@ See [[optimal-estimating-patterns]] for more. Objections to the use of historical data in new estimates are not unfounded. A framework to do so competently and consistently does not currently exist. - -> [!info] -> Nor does the software necessary to utilize such a framework efficiently. +Nor does the software necessary to utilize such a framework efficiently. The goal in and of itself ought not be controversial, however. Businesses regularly make far riskier decisions based on projections @@ -117,7 +104,8 @@ Estimators know what the most likely and most expensive options are for a given and can fill in the detail required for item-oriented takeoff. This is called an **assumption** and is the basis of cost estimation. -Assumptions are fundamentally incompatible with item-oriented estimating as it is commonly implemented. +Assumptions are fundamentally incompatible with item-oriented estimating +as it is commonly implemented. It is not possible to compare price possibilities except by creating separate takeoffs and breakdowns for each one. diff --git a/takeoff-review.md b/takeoff-review.md index 670db13..d21bea3 100644 --- a/takeoff-review.md +++ b/takeoff-review.md @@ -1,13 +1,13 @@ --- id: aliases: [] +title: Takeoff Review tags: - authorship/original - destiny/permanent - occupational/takeoff - status/incomplete - type/encyclopedia -title: Takeoff Review --- # Takeoff Review @@ -22,3 +22,10 @@ Count Car chargers and location Ensure takeoff is in the generator `Area` and `System` breakdowns Put location, quantity, and type on OneNote + +## Fixtures + +1. Garage Homeruns +2. Luminaire in Amenity Areas +3. Ensure appropriate breakdowns + * Site lighting in System "FML - Site Fixtures Material & Labor"