diff --git a/home.md b/home.md
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+++ b/home.md
@@ -5,6 +5,7 @@ tags: []
 # Home
 
 Welcome to [[zane-meyers|my]] notebook!
+
 This is the primary entry point for use with [[obsidian]],
 which means you either have contributor access to the GitHub repo,
 or you have a local copy.
diff --git a/pdi-estimating-error-kde.png b/pdi-estimating-error-kde.png
new file mode 100644
index 0000000..eacfde0
Binary files /dev/null and b/pdi-estimating-error-kde.png differ
diff --git a/periodic/daily/2026-05-07.md b/periodic/daily/2026-05-07.md
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+++ b/periodic/daily/2026-05-07.md
@@ -0,0 +1,10 @@
+---
+id: 2026-05-07
+title: 2026-05-07
+tags: []
+weekly: "[[2026w19]]"
+monthly: "[[2026-05]]"
+quarterly: "[[2026q2]]"
+previous: "[[2026-05-06]]"
+---
+# 2026-05-07
diff --git a/periodic/daily/2026-05-17.md b/periodic/daily/2026-05-17.md
new file mode 100644
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--- /dev/null
+++ b/periodic/daily/2026-05-17.md
@@ -0,0 +1,10 @@
+---
+id: 2026-05-17
+title: 2026-05-17
+tags: []
+weekly: "[[2026w21]]"
+monthly: "[[2026-05]]"
+quarterly: "[[2026q2]]"
+previous: "[[2026-05-16]]"
+---
+# 2026-05-17
diff --git a/periodic/daily/2026-05-18.md b/periodic/daily/2026-05-18.md
new file mode 100644
index 0000000..6ed65fd
--- /dev/null
+++ b/periodic/daily/2026-05-18.md
@@ -0,0 +1,10 @@
+---
+id: 2026-05-18
+title: 2026-05-18
+tags: []
+weekly: "[[2026w21]]"
+monthly: "[[2026-05]]"
+quarterly: "[[2026q2]]"
+previous: "[[2026-05-17]]"
+---
+# 2026-05-18
diff --git a/periodic/daily/2026-05-19.md b/periodic/daily/2026-05-19.md
new file mode 100644
index 0000000..57829f2
--- /dev/null
+++ b/periodic/daily/2026-05-19.md
@@ -0,0 +1,10 @@
+---
+id: 2026-05-19
+title: 2026-05-19
+tags: []
+weekly: "[[2026w21]]"
+monthly: "[[2026-05]]"
+quarterly: "[[2026q2]]"
+previous: "[[2026-05-18]]"
+---
+# 2026-05-19
diff --git a/periodic/daily/2026-05-20.md b/periodic/daily/2026-05-20.md
new file mode 100644
index 0000000..f74affc
--- /dev/null
+++ b/periodic/daily/2026-05-20.md
@@ -0,0 +1,10 @@
+---
+id: 2026-05-20
+title: 2026-05-20
+tags: []
+weekly: "[[2026w21]]"
+monthly: "[[2026-05]]"
+quarterly: "[[2026q2]]"
+previous: "[[2026-05-19]]"
+---
+# 2026-05-20
diff --git a/periodic/daily/2026-05-21.md b/periodic/daily/2026-05-21.md
new file mode 100644
index 0000000..5c629e2
--- /dev/null
+++ b/periodic/daily/2026-05-21.md
@@ -0,0 +1,10 @@
+---
+id: 2026-05-21
+title: 2026-05-21
+tags: []
+weekly: "[[2026w21]]"
+monthly: "[[2026-05]]"
+quarterly: "[[2026q2]]"
+previous: "[[2026-05-20]]"
+---
+# 2026-05-21
diff --git a/periodic/monthly/2026-05.md b/periodic/monthly/2026-05.md
new file mode 100644
index 0000000..1a456cb
--- /dev/null
+++ b/periodic/monthly/2026-05.md
@@ -0,0 +1,7 @@
+---
+title: 2026-05
+tags: []
+yearly: "[[2026]]"
+previous: "[[2026-04]]"
+---
+# 2026-05
diff --git a/periodic/weekly/2026w18.md b/periodic/weekly/2026w18.md
new file mode 100644
index 0000000..1b8992c
--- /dev/null
+++ b/periodic/weekly/2026w18.md
@@ -0,0 +1,7 @@
+---
+title: 2026w18
+tags: []
+yearly: "[[2026]]"
+previous: "[[2026w17]]"
+---
+# 2026w18
diff --git a/periodic/weekly/2026w19.md b/periodic/weekly/2026w19.md
new file mode 100644
index 0000000..1747836
--- /dev/null
+++ b/periodic/weekly/2026w19.md
@@ -0,0 +1,7 @@
+---
+title: 2026w19
+tags: []
+yearly: "[[2026]]"
+previous: "[[2026w18]]"
+---
+# 2026w19
diff --git a/periodic/weekly/2026w20.md b/periodic/weekly/2026w20.md
new file mode 100644
index 0000000..a8b3168
--- /dev/null
+++ b/periodic/weekly/2026w20.md
@@ -0,0 +1,7 @@
+---
+title: 2026w20
+tags: []
+yearly: "[[2026]]"
+previous: "[[2026w19]]"
+---
+# 2026w20
diff --git a/periodic/weekly/2026w21.md b/periodic/weekly/2026w21.md
new file mode 100644
index 0000000..8335e07
--- /dev/null
+++ b/periodic/weekly/2026w21.md
@@ -0,0 +1,7 @@
+---
+title: 2026w21
+tags: []
+yearly: "[[2026]]"
+previous: "[[2026w20]]"
+---
+# 2026w21
diff --git a/timestamped/2026-05-21_08-12-01.md b/timestamped/2026-05-21_08-12-01.md
new file mode 100644
index 0000000..57f1ed6
--- /dev/null
+++ b/timestamped/2026-05-21_08-12-01.md
@@ -0,0 +1,23 @@
+---
+id: 2026-05-21T08:12:01-0400
+title: 2026-05-21 08:12:01
+tags:
+  - topic/estimating
+daily: "[[2026-05-21]]"
+---
+# 2026-05-21 08:12:01
+
+While working on [[303-mariposa-residence]],
+after spending hours working on lighting control,
+[[jared-defanti]] and I found a set of keynotes
+that totally changed our assumptions for takeoff,
+requiring that we change several designations.
+He asked if this was a common occurrence,
+I replied that he should expect it to happen
+a couple dozen times per project.
+I've said often that I'm obsessive in my takeoff
+with the expectation that I will need to change most takeoffs,
+but I only realized then
+that I am not expecting a revision to the RFP documents,
+but that my understanding of the requirements will change
+as I make new discoveries in takeoff.
diff --git a/timestamped/2026-05-21_12-29-53.md b/timestamped/2026-05-21_12-29-53.md
new file mode 100644
index 0000000..70af5f7
--- /dev/null
+++ b/timestamped/2026-05-21_12-29-53.md
@@ -0,0 +1,27 @@
+---
+id: 2026-05-21T12:29:53-0400
+title: 2026-05-21 12:29:53
+tags: []
+daily: "[[2026-05-21]]"
+---
+# 2026-05-21 12:29:53
+
+## Labor Productivity Factor Given Effective Temperature and Relative Humidity
+
+Data from [[awad_2004_temperature]]
+
+|  °F |  20% |  30% |  40% |  50% |  60% |  70% |  80% |  90% |
+| ---:| ----:| ----:| ----:| ----:| ----:| ----:| ----:| ----:|
+| 110 | 0.61 | 0.62 | 0.63 | 0.60 | 0.57 | 0.50 | 0.15 | 0.00 |
+| 100 | 0.82 | 0.83 | 0.84 | 0.82 | 0.80 | 0.76 | 0.68 | 0.57 |
+|  90 | 0.93 | 0.93 | 0.94 | 0.94 | 0.93 | 0.90 | 0.87 | 0.84 |
+|  80 | 0.99 | 0.99 | 0.99 | 0.99 | 0.98 | 0.97 | 0.95 | 0.93 |
+|  70 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.99 | 0.98 | 0.96 |
+|  60 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.98 |
+|  50 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.98 |
+|  40 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.99 | 0.98 | 0.96 |
+|  30 | 0.98 | 0.98 | 0.98 | 0.98 | 0.98 | 0.97 | 0.95 | 0.93 |
+|  20 | 0.94 | 0.94 | 0.94 | 0.94 | 0.94 | 0.93 | 0.91 | 0.89 |
+|  10 | 0.88 | 0.88 | 0.88 | 0.88 | 0.87 | 0.86 | 0.84 | 0.82 |
+|   0 | 0.78 | 0.78 | 0.78 | 0.77 | 0.76 | 0.75 | 0.73 | 0.71 |
+| -10 | 0.62 | 0.62 | 0.62 | 0.61 | 0.60 | 0.59 | 0.57 | 0.55 |
diff --git a/timestamped/2026-05-21_16-18-20.md b/timestamped/2026-05-21_16-18-20.md
new file mode 100644
index 0000000..7e512f6
--- /dev/null
+++ b/timestamped/2026-05-21_16-18-20.md
@@ -0,0 +1,15 @@
+---
+id: 2026-05-21T16:18:20-0400
+title: 2026-05-21 16:18:20
+tags:
+  - topic/estimating
+  - occupational
+daily: "[[2026-05-21]]"
+---
+# 2026-05-21 16:18:20
+
+Below is a plot of [[pdi-estimating]] error for every estimate stage.
+The data is not ideal, being sourced from the default bid sheet data.
+The majority have baseline dates in 2020 to 2022.
+
+![[pdi-estimating-error-kde.png]]