Obst
08-11-2005, 10:01 PM
Guide:The Skill % Formula
By Obst
If you ever wondered "WTH is that small bar right next to my Sailors' stats for?", then this guide is for you. I explain in detail what exactly that bar is and what affects it.
The bar represents the so-called "Skill Percentage" of the Sailor, or "Skill %".
It takes into account how many Experts, Veterans and Recruits you have and puts all this information into a graph.
When you don't have big amounts of Experts and Vets you will notice that the bar is white on the left end and grey on the other.
The length of the white bar in relation to the total length of the bar (white+grey area) represents the Skill %, so if 50% of the bar is white your Sailor has 50% Skill %.
A Skill % of 100% represents the moment when the whole crew (maxed out) of the Sailor consists of Experts. If you know that Veterans are worth 2.5 Experts per Vet you will notice that you can go over 100% if you have enough Vets. This is possible, and if you look further down you will see a comparison of a 100% bar and a 100%+++ bar to show you the difference.
But now, let's look at how the Skill % is calculated:
The formula is
Skill % = {( [ Amount of Experts ] + 2.5*[ Amount of Vets ] ) / [ Max Crew ] }*( [ Crew on the sailor ] / [ Max Crew ] )
So (shortened, for the people who know what the terms mean) it's [(Experts+2.5*Vets)/(Max Crew)]*[Crew used in %]
And with a nice graphic it becomes even more obvious :D
http://www.hosting.nsagames.com/obst/navyfield/skillformula/formula.gif
This explains how recruits affect the Skill Precentage.
Ability Values:
1 Recruit = 0
1 Expert = 1
1 Veteran = 2.5
Now on to proving my theory...
OK this is my gunner:
http://www.hosting.nsagames.com/obst/navyfield/skillformula/112.jpg
According to the formula, he has 112% skill.
Doing some maths we can calculate the theoretical amount of recruits needed to get him to 100% , then remove a recruit to check the indicator (graphical change of bar to display grey area and not full-white).
(309 + 74*2,5)/440*(X+309+74)/440 = 1
With X as the number of recruits needed.
Result: 8.9
As we don't have .9 recruits, the gunner would need 9 recruits to stay at 100%.
http://www.hosting.nsagames.com/obst/navyfield/skillformula/100.jpg
Now let's take 1 more recruit off
http://www.hosting.nsagames.com/obst/navyfield/skillformula/99.jpg
And zing! Formula proven!
Now let's get even more proof:
Let's compare the length of the bars on my 112% and 100% pics
http://www.hosting.nsagames.com/obst/navyfield/skillformula/112_100.jpg
The upper graphs are from the 100%, the lower ones are from the 112%.
I counted the pixel lengths, 100% = 24 pixels, 112% = 27 pixels.
24*1.12 = 26,88 ~ 27
As you can see, the formula applies to this without any error.
Do the maths and my formula fits perfectly into everything.
By Obst
If you ever wondered "WTH is that small bar right next to my Sailors' stats for?", then this guide is for you. I explain in detail what exactly that bar is and what affects it.
The bar represents the so-called "Skill Percentage" of the Sailor, or "Skill %".
It takes into account how many Experts, Veterans and Recruits you have and puts all this information into a graph.
When you don't have big amounts of Experts and Vets you will notice that the bar is white on the left end and grey on the other.
The length of the white bar in relation to the total length of the bar (white+grey area) represents the Skill %, so if 50% of the bar is white your Sailor has 50% Skill %.
A Skill % of 100% represents the moment when the whole crew (maxed out) of the Sailor consists of Experts. If you know that Veterans are worth 2.5 Experts per Vet you will notice that you can go over 100% if you have enough Vets. This is possible, and if you look further down you will see a comparison of a 100% bar and a 100%+++ bar to show you the difference.
But now, let's look at how the Skill % is calculated:
The formula is
Skill % = {( [ Amount of Experts ] + 2.5*[ Amount of Vets ] ) / [ Max Crew ] }*( [ Crew on the sailor ] / [ Max Crew ] )
So (shortened, for the people who know what the terms mean) it's [(Experts+2.5*Vets)/(Max Crew)]*[Crew used in %]
And with a nice graphic it becomes even more obvious :D
http://www.hosting.nsagames.com/obst/navyfield/skillformula/formula.gif
This explains how recruits affect the Skill Precentage.
Ability Values:
1 Recruit = 0
1 Expert = 1
1 Veteran = 2.5
Now on to proving my theory...
OK this is my gunner:
http://www.hosting.nsagames.com/obst/navyfield/skillformula/112.jpg
According to the formula, he has 112% skill.
Doing some maths we can calculate the theoretical amount of recruits needed to get him to 100% , then remove a recruit to check the indicator (graphical change of bar to display grey area and not full-white).
(309 + 74*2,5)/440*(X+309+74)/440 = 1
With X as the number of recruits needed.
Result: 8.9
As we don't have .9 recruits, the gunner would need 9 recruits to stay at 100%.
http://www.hosting.nsagames.com/obst/navyfield/skillformula/100.jpg
Now let's take 1 more recruit off
http://www.hosting.nsagames.com/obst/navyfield/skillformula/99.jpg
And zing! Formula proven!
Now let's get even more proof:
Let's compare the length of the bars on my 112% and 100% pics
http://www.hosting.nsagames.com/obst/navyfield/skillformula/112_100.jpg
The upper graphs are from the 100%, the lower ones are from the 112%.
I counted the pixel lengths, 100% = 24 pixels, 112% = 27 pixels.
24*1.12 = 26,88 ~ 27
As you can see, the formula applies to this without any error.
Do the maths and my formula fits perfectly into everything.