planaplan.com.au

On-Demand Inclement Weather Calendar Creation & Analysis

Automated P6 calendars for any location in Australia — analysed against real inclement weather impacts on projects across Australia & NZ.
20 years of real wet weather analysis on 1000s of projects
TILOS P6 → TILOS conversions Time–location programming for linear works. Official AU/NZ TILOS reseller.
Browse our other tools On Demand GIS Production Rate Tracker On Demand Test Your P6 On Demand Schedule Health
STEP 1 · FIND YOUR LOCATION & SET THE RULES
ready — drop a P6, click the map or type a postcode to begin
1Find your location
Add your P6
Drop your .xer here or browse your computer
The shortcut to everything
Finds your site — no typing, no setup
Rates the allowance you already carry
Shows the hit to your finish date
New calendars back inside your own file, import-ready
Your file is read, never modified.
Or click the map
Click anywhere in Australia.
Or postcode / place
Stations ranked by distance and record quality — what matters is how much was actually observed rather than interpolated.
2Inclement weather options
How wind stops work. A crane stops lifting when the gust at the boom head exceeds its chart — mobile cranes commonly stand down at 9–13 m/s (32–47 km/h), EWPs and personnel platforms around 8.9 m/s, conductor stringing around 12.5 m/s, and tower cranes go out of service near 20 m/s. Limits are gusts at height, so the series is matched to the work: 10 m for ground-level limits, 50 m for crane and tower work.
Where the data comes from. SILO has no wind, so the series is fetched automatically from the Bureau’s BARRA2 regional reanalysis at your pin — hourly winds 1979–present, reduced to each day’s worst hour (a stand-down is decided by the worst hour, not the average). CC BY 4.0. Prefer your own anemometer? Point at a CSV below and it is used instead.
3Delay criteria
Plan A exclusive Use 20 years of real project dataDelay factors measured on real Australian projects and validated against actual approved extension-of-time records — the library behind every Plan A programme.
My own criteriaSet your own lost-time days per rain day at each rainfall threshold.
Your figures are applied to the full rainfall record at this location, but the documents will state the criteria as client-supplied — the validation behind the measured library only travels with the measured library.
4Project type 
5Calendar rules
6Delivery
Your Basis of Schedule is prepared in your company's name — it is going to your client, so it reads like your document, not ours.
Every file lands in this inbox the moment the build finishes.
STEP 2 · YOUR ANALYSIS — example shown until you press Analyse
EXAMPLE — this becomes YOUR site the moment you locate the job and press Analyse
Example site — Earthworks auto P50
P0P20 P50P80P100
P50 — the position validated against measured project actuals.
194
Working days per year
58.4
Work days lost per year
22.6%
Of working time
1.16
Lost days per working week
58.4summed monthly — drives the calendar
65.9true annual P50 — quote this figure
-7.5difference (-11%)
40–95range across 50 actual years
Days per month — type over any figure to adopt your own
Window. 1963–2012 (50 complete years, 2 excluded)
Source. the best BOM station near your pin, via SILO — CC BY 4.0
Example only
What lands when you press Accept
CF-NSW-P50.xer Calendar.xlsx TILOS bands.csv Weather Allowance Report.pdf Basis of Schedule.docx Weather Insights.pdf
Date DayTypeEvidence
2027-01-12TueWeatheranalogue 1999; source 1999-01-11, 14.5 mm; rain 14.5 mm > 10 mm the day before
2027-01-15FriWeatheranalogue 1999; source 1999-01-15, 12.5 mm; band 10–25 mm, factor 1.40
2027-01-26TuePublic holidayAustralia Day
2027-01-29FriRDORDO - fortnightly Friday
Every blocked day cites the observation behind it.
Your programme
CalendarTasks WkExcPHShut RDOBlock Weather/yr
Weather allowance auto P50
drier than normal a normal year much wetter than normal
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P0P20 P50P80P100
What does P50 actually mean? — 30 seconds, no maths

Forget the word probability. It is about counting years.

Take the last 50 years at this location. Work out how many days of wet weather you would have lost in each one. Now line those 50 years up, worst to best.

P50 is the middle year. Half the years were worse than it, half were better. A normal year.
P80 is the year where only one year in five was worse. So in four years out of five, this allowance would have been enough.

The thing everyone gets wrong: P80 does not mean you are 80% confident. It means four years in five, this much rain or less. You have not become more certain — you have allowed for more of the bad years.

If someone still is not with you, use the drive to work. Your commute normally takes 30 minutes, but some days it is 45. Leave 30 minutes early and you are late half the time — that is P50. Leave 45 minutes early and you are on time four days out of five — that is P80. You are not a better driver. You have allowed for the bad days.

 What it isWhen you would use it
P50A normal year Someone else carries the weather risk, or you want a realistic mid‑case
P80A bad year, but not the worst You carry the risk and do not want to be back asking for time
P90A year that bad turns up about once a decade Rarely defensible — you are pricing a rare event into every job

Higher number = bigger allowance = safer for you, because lost days are the bad thing being counted. Wind and solar studies use the same letters the opposite way round, which is how arguments start in meetings.

—
Working days per year
—
Work days lost per year
—
Of working time
—
Lost days per working week
Days per month — type over any figure to adopt your own
Calendar built
Every blocked day and the observation behind it is listed in the Basis of Schedule.
Working…