Talk:Akashi's Improvement Arsenal/@comment-26334968-20150911094238/@comment-26154973-20150911193529

It comes from tests (e.g. http://ch.nicovideo.jp/biikame, http://ja.kancolle.wikia.com/, they do tests themselves and also include data posted on Shitaraba), so the current situation is described at [wikiwiki http://wikiwiki.jp/kancolle/?%B2%FE%BD%A4%B9%A9%BE%B3]: 計算式は「改修強化値＝装備別補正値×√(★改修値)」が有力. 小数点以下も計算されるため、★がついた装備を複数装備すると小数分が繰り上がることがある. And an example: 例1:12.7cm連装砲★+6(2.449)と★+7(2.645)の2つを装備すると火力+5分の砲撃ダメージ上昇となる, if k = 1 for firepower for small guns, then one 12.7cm +6 is no different from one 12.7cm +7 (sqrt then floor, it's +2 FP in both cases), BUT the combination of one 12.7cm +6 and one 12.7cm +7 is better (not the sum of floored values, but the sum of sqrt's and then floor, it's +5 FP). The exact coefficients are what's important, current estimated values are listed in that wikiwiki article (also here), for one 41cm +9 is better then +8 in accuracy (assuming k = 2), but also the combination of two +9 is better in firepower than two +8 (while one +8 is the same as one +9, assuming k = 1.5).