vault backup: 2025-07-28 17:12:58

.obsidian/graph.json

@@ -1,7 +1,7 @@
 {
   "collapse-filter": false,
   "search": "",
-  "showTags": true,
+  "showTags": false,
   "showAttachments": false,
   "hideUnresolved": true,
   "showOrphans": true,

.obsidian/plugins/excalibrain/data.json

@@ -228,7 +228,12 @@
     "n": {},
     "Next": {}
   },
-  "navigationHistory": [],
+  "navigationHistory": [
+    "README.md",
+    "systems.md",
+    "electrical.md",
+    "lighting-controls.md"
+  ],
   "allowOntologySuggester": true,
   "ontologySuggesterParentTrigger": "::p",
   "ontologySuggesterChildTrigger": "::c",

README.md

@@ -12,5 +12,10 @@ tags:
 > This note on the meta-formatting of this repository.
 > For contents, prose conventions, etc. see [[this-notebook]].
 
-* [Obsidian syntax](https://help.obsidian.md/)
+## Syntax
-* [Markdown Oxide syntax](https://oxide.md/)
+
+Notes are written in [Obsidian-flavored markdown](https://help.obsidian.md/),
+which is partially reimplemented by [Markdown Oxide](https://oxide.md/)
+for use in editors other than Obsidian.
+
+Novel syntax implemented by Obsidian plugins should be avoided.

excalibrain.md

@@ -0,0 +1,87 @@
+---
+
+excalidraw-plugin: parsed
+excalidraw-default-mode: view
+excalidraw-export-dark: false
+excalidraw-export-transparent: false
+excalidraw-linkbutton-opacity: 0.3
+excalidraw-onload-script: "app.plugins.plugins[`excalibrain`].start(ea.targetView.leaf);"
+
+tags: [excalidraw]
+
+---
+
+# Text Elements
+Open a document in another pane and click it to get started.
+
+For the best experience enable 'Open in adjacent pane'
+in Excalidraw settings under 'Links and Transclusion'. ^4mylk7KK
+
+%%
+# Drawing
+```json
+{
+	"type": "excalidraw",
+	"version": 2,
+	"source": "https://excalidraw.com",
+	"elements": [
+		{
+			"type": "text",
+			"version": 1,
+			"versionNonce": 423577018,
+			"isDeleted": false,
+			"id": "4mylk7KK",
+			"fillStyle": "hachure",
+			"strokeWidth": 1,
+			"strokeStyle": "solid",
+			"roughness": 1,
+			"opacity": 100,
+			"angle": 0,
+			"x": 0,
+			"y": 0,
+			"strokeColor": "white",
+			"backgroundColor": "transparent",
+			"width": 703,
+			"height": 96,
+			"seed": 4429,
+			"groupIds": [],
+			"strokeSharpness": "sharp",
+			"boundElements": [],
+			"updated": 1650784785611,
+			"link": null,
+			"locked": false,
+			"fontSize": 20,
+			"fontFamily": 3,
+			"text": "Open a document in another pane and click it to get started.\n\nFor the best experience enable 'Open in adjacent pane'\nin Excalidraw settings under 'Links and Transclusion'.",
+			"rawText": "Open a document in another pane and click it to get started.\n\nFor the best experience enable 'Open in adjacent pane'\nin Excalidraw settings under 'Links and Transclusion'.",
+			"baseline": 91,
+			"textAlign": "center",
+			"verticalAlign": "top",
+			"containerId": null,
+			"originalText": "Open a document in another pane and click it to get started.\n\nFor the best experience enable 'Open in adjacent pane'\nin Excalidraw settings under 'Links and Transclusion'."
+		}
+	],
+	"appState": {
+		"theme": "dark",
+		"viewBackgroundColor": "hsl(208, 80%, 23%)",
+		"currentItemStrokeColor": "#000000",
+		"currentItemBackgroundColor": "transparent",
+		"currentItemFillStyle": "hachure",
+		"currentItemStrokeWidth": 2,
+		"currentItemStrokeStyle": "solid",
+		"currentItemRoughness": 1,
+		"currentItemOpacity": 100,
+		"currentItemFontFamily": 1,
+		"currentItemFontSize": 16,
+		"currentItemTextAlign": "left",
+		"currentItemStrokeSharpness": "sharp",
+		"currentItemStartArrowhead": null,
+		"currentItemEndArrowhead": "arrow",
+		"currentItemLinearStrokeSharpness": "round",
+		"gridSize": null,
+		"colorPalette": {}
+	},
+	"files": {}
+}
+```
+%%

full-takeoff.md

@@ -4,10 +4,8 @@ aliases: []
 tags:
   - guide
   - occupational
-friends:
-  - project-setup
 ---
-# Estimating Workflow
+# Full Takeoff
 
 ## Sequence
 

perfect-information.md

@@ -1,29 +0,0 @@
----
-id:
-aliases: []
-tags:
-  - risk
----
-# Perfect Information
-
-In [[strategy]], perfect information is hypothetical information
-that would eliminate some defined [[uncertainty]].
-
-## Expected Value of Perfect Information
-
-Expected value of perfect information (EVPI)
-is the price that one would be willing to pay
-in order to gain access to perfect information.
-
-The perceived _value_ of decreased uncertainty
-must be weighed against its _cost_.
-
-This concept provides the basis for the solution of one or more [[open-problems-in-estimating]].
-To reduce [[risk]] in [[construction-estimating]],
-an organization pays in estimator hours.
-These hours have a direct cost in salary and benefits,
-however the greater cost is the opportunity cost
-of tying up an estimator who could otherwise be starting a new project.
-
-In many cases, the utility of doubled throughput
-far outweighs the increased risk of individual bids.

risk-oriented-estimating.md

@@ -11,7 +11,7 @@ Risk-Oriented Estimating (ROE), is a methodology for [[construction-estimating]]
 * prioritizes estimating tasks,
 * determines necessary [[estimating-detail]]
 
-ROE leans heavily on [[perfect-information]],
+ROE leans heavily on [[uncertainty#Value of Information]],
 which challenges the natural tendency to shy from uncertainty
 with the reality of the cost of certainty.
 
@@ -41,16 +41,17 @@ ROE prioritizes estimating tasks by their contribution to _cost certainty_.
 ROE determines the appropriate level of [[estimating-detail]]
 given an organization's [[risk#Risk Tolerance]].
 
-## EVPI Takeoff
+### EVI Takeoff
 
-%%
+Expected value of information (EVI)
 
-## Scratch
+### Takeoff Optimization
 
-Expected value of perfect information (EVPI)
+For systems where EVI analysis determines manual takeoff is still necessary,
+optimizations can be made to decrease the required effort of takeoff,
+and thus the opportunity cost of takeoff.
 
 Count-based takeoff speed increases with count.
-%%
 
 Optimizing the takeoff process means:
 
@@ -62,6 +63,13 @@ Optimizing the takeoff process means:
 > It appears that similar efforts have already been made here,
 > their success being a matter of perspective.
 
-> [!note] Naming Conventions (Use Case vs. Description)
+#### Naming Conventions (Use Case vs. Description)
-> 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_.
+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_.
+
+| Use Case            | Description   |
+| ------------------- | ------------- |
+| Hi-Hat              | Daisy-Chain   |
+| Furnished By Others | Rough-In Only |

uncertainty.md

@@ -1,14 +1,57 @@
 ---
 id: uncertainty
 aliases: []
-tags: 
+tags:
   - risk
 ---
 # Uncertainty
 
 The term "uncertainty" refers to the possibility of multiple outcomes.
 
-## Aleatory Uncertainty
+## Information
+
+In statistical inference and [[strategy]],
+**information** is the resolution of uncertainty.
+
+### Value of Information
+
+> [!quote]
+> **Value of information** (VOI or VoI)
+> is the amount a decision maker would be willing to pay
+> for information prior to making a decision.
+
+It is the value of the reduction in uncertainty
+that the information provides.
+
+### Expected Value of Perfect Information
+
+Expected value of perfect information (EVPI)
+is the price that one would be willing to pay
+in order to gain access to perfect information.
+
+> [!info] Perfect Information
+> Perfect information is hypothetical information
+> that would eliminate all uncertainty.
+
+The perceived _value_ of decreased uncertainty
+must be weighed against its _cost_.
+
+#### In Construction Estimating
+
+This concept provides the basis for the solution
+of one or more [[open-problems-in-estimating]].
+To reduce [[risk]] in [[construction-estimating]],
+an organization pays in estimator hours.
+These hours have a direct cost in salary and benefits,
+however the greater cost is the opportunity cost
+of tying up an estimator who could otherwise be starting a new project.
+
+In many cases, the utility of doubled throughput
+far outweighs the increased risk of individual bids.
+
+## Types of Uncertainty
+
+### Aleatory Uncertainty
 
 > [!info] Also Known As
 > * statistical uncertainty
@@ -17,10 +60,11 @@ The term "uncertainty" refers to the possibility of multiple outcomes.
 
 Aleatory uncertainty is inherent randomness in data that can't be explained away.
 
-## Epistemic Uncertainty
+### Epistemic Uncertainty
 
 > [!info] Also Known As
 > * systematic uncertainty
 > * model uncertainty
 
-Epistemic uncertainty is that which arises from a lack of knowledge.
+Epistemic uncertainty is that which arises from a lack of knowledge,
+and can be eliminated with access to [[#information]].