This article is a very interesting read for everyone that works in a project. It deals with the perils of time estimation of a project and the underlying thesis is that the further you break things down to estimate the time of each piece of work to do, no matter if you are doing agile stories or some other way of organising your work, the longer the project estimate will be. This is beacause the more fine-grained you break things down the more factors like rounding errors, lead times to start each task and some general fear factors will be multiplied in and create a longer over all project time. As the granularity approaches zero the time to complete the project approaches infinity – we have in short a fractal time.
Everyone who has worked in the form of a project knows that most business organisations are top-down organisations that focus on mainly three things, money, time and quality. You are given a budget for a project based on an estimate that seems sound to the investors but when the statistics says that only 1/3 of what was originally described is ever delivered, another 1/3 is delivered but with severe changes and the last 1/3 is obsoleted, replaced and never delivered as orginally stated, then what bearing on the actual work has any ever so good project estimation?
Some of you already know my fascination for wrist watches and therefore I thought I should share with you my latest aquisition, the Suunto Core outdoor wristwatch. Suunto is Finnish and means direction and this is a good name for these watches. There are many different models to chose from and I decided to get the Suunto Core model which seems to get you lots of functions for small money and the most all-round watch there was. Or, sorry, wristtop computer as these watches are sometimes referred to.
I am a guy who like walking in the woods, hiking, trekking and just generally being outdoor when possible especially in the summer time. I try to make at least a few day trips and if possible an overnight in a tent as well every summer as a minimum, it is something special when you are cooking in the wilderness, sleeping in a tent and generally having to struggle a little more than you normally do every day to and from work. If nothing else you appreciate a nice bed when you come home again :)
On top of that I am an unchangeable gadget-guy, and I really enjoy knowing the altitude I am on right now, the bearing I am walking in, my position, the time, when the sun rises and sets on the latitude that I am right now and many other things. So my latest addition to things I won’t leave home without now is a Suunto Core wristwatch.
This little gem can do a lot of things and it is a watch specially designed for outdoorsmanship more than anything else. This is not the first ”trekker’s watch” I have owned, I also have an ”Origo” watch but after a particularly rough outing in the United Arab Emirates a couple of years ago the altimeter broke on that one. So I have decided to get myself a new watch and now I recently bought it.
The Suunto Core watch keeps two times, good for traveling and it has what you expect from a modern digital watch, countdown (99 min max) and works wel as a stopwatch (24 h max). On top of that you can program it with the closest city and it will show the time the sun rises and sets for the date, something that changes drastically right now, the day becomes longer with about 6 minutes every day now and the nights shorter here in Stockholm.
The watch also contains three interesting functions for the hiker not normally found on wrist watches and they are altimeter that shows how high over the sea you are at the moment, barometer showing the air pressure (sea level equivalent) and an electronic compass.
The altimeter and barometer are actually two faces of the same coin here. You can select the profile yourself, if you want the watch to be in altimeter mode when you climb, then you can set it to barometric mode when you stop for the night and the watch will tell you the air pressure and assume that you are staying on the same level. You can not get both at the same time though because both the barometer and the altimeter works from the same air pressure sensor. If you climb a mountain the air pressure lowers with every meter you climb, the watch senses this change in air pressure and can therefore know how many meters you have scaled. In barometric mode you fix the altitude and the watch instead registers the changes in air pressure that preceeds an oncoming storm or weather front.
The watch can automatically shift between altimeter and barometer mode, it understands when you start climbing because the air pressure shifts too fast and then it switches to altimeter. If you stay it will after 12 minutes of no change in the altitude (or very small changes) shift back to barometric mode. Brilliant. Over a full days walking around I generally don’t have to recalibrate it for more than 20-40 meters error by the end of the day.
In barometric mode it can also tell you if there is a sudden drop in air pressure. This might signify an oncoming sqall or storm and you can set an audible and visible alarm on the watch to go off if this happens. There is also a 24 hour trend graph that will show you the changes in barometric pressure over the last day and night. There is also an arrow indicator showing you if the air pressure is stable, tends to rise, tends to drop and the attitude for the last 3 and 6 hours. Great for checking if the current weather is stable. I have observed the barometric pressure alarm go off twice. In both accounts it started snowing heavily hours later so I believe it is working pretty well!
The last function of the pressure gauge is the ”snorkeling feature” where it can tell you when you snorcle in the hot waters of the Maldives or some other nice place how deep you have been as maximum and how deep you are now. Not quite a diving instrument (watch should not be submerged more than 10 meters really) but it is still a pretty fun feature.
A logging function can be used to keep track of your climbing and descending over time if you want. It will log the altitude and the current time as often as you want and you may also save the log for a later review. You can also set a reference altitude and the watch will show you how much above or below your reference you currenly are.
You can also have it show accumulated inclines declines, something that I thought was pretty neat in a ski slope…
There is also a temperature measurement but since the watch is warmed by your arm it generally does not show air temperature. If you take your watch of and leave it for 30 minutes or so it should give you a pretty good temperature reading though. The temperature is also necessary for the accuracy of the air pressure measurement.
The compass is great, works well but uses battery more than other thngs and because of this the watch will turn it off after one minute of operation; you will then have to press a button to turn it on again for another minute. If you have the backlight lit during compas operation it will flash as it goes dark for each measurement that is done – about 2 per second. The compass can be set to try to stay in a certain direction, it will show with arrows how much in error your current direction is and point you in the right direction and the precision is actually pretty good in the woods. Calibration is simple, turn it on, slowly spin a full circle clockwise and it will recalibrate itself. In urban environment there are sometimes problems where there are heavy electrical machinery and other ferro-magnetic materials at work that will confuse it – try looking at it while a metro train in the underground drives past… but most of the time it can be used there as well.
All in all I really love this watch. I recommend it for everyone who loves to be outdoors, hiking, fishing, hunting, climbing, skiing… this is for you!