| Biggerboat said: software attach rates per console per month. Wii - total months of system ownership : 48,429,999 total software : 33,858,879 games bought per month per owner : 0.699 PS3 - total months of system ownership : 21,022,083 total software : 13,631,231 games bought per month per owner : 0.648
360 - total months of system ownership : 107,171,061 total software : 64,576,927 games bought per month per owner : 0.603 ** My calculations were based on numbers presented on this site. I worked out the total months of system ownership by looking at the monthly charts and recording how many systems were sold during a specific month. For example 1 console bought in Nov 05 + 1 in Nov 06 + 1 in Dec 07 = 26 + 14 + 1 = 41 months. If anyone spots any errors in my sums let me know and I'll ammend them.
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You did say that your calculation was based like this 1 * Nov05 + 1 * Nov06 + 1 * Dec07 = 41 months...
I dont see how you reached that figure.... for reference use the table below.
Take a look at my comparison..
| SL No | Month | X360 | Wii | PS3 | ||||||||||||
| Consoles | LT Sales | SW | LT Sales | Att Rate | Consoles | LT Sales | SW | LT Sales | Att Rate | Consoles | LT Sales | SW | LT Sales | Att Rate | ||
| 1 | Nov-05 | 352,952 | 352,952 | 1,450,984 | 1,450,984 | 4.1110 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 2 | Dec-05 | 298,384 | 651,336 | 1,395,738 | 2,846,722 | 2.1429 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 3 | Jan-06 | 264,521 | 915,857 | 752,342 | 3,599,064 | 0.8215 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 4 | Feb-06 | 188,500 | 1,104,357 | 730,322 | 4,329,386 | 0.6613 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 5 | Mar-06 | 212,229 | 1,316,586 | 1,795,946 | 6,125,332 | 1.3641 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 6 | Apr-06 | 313,162 | 1,629,748 | 1,436,626 | 7,561,958 | 0.8815 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 7 | May-06 | 264,390 | 1,894,138 | 967,718 | 8,529,676 | 0.5109 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 8 | Jun-06 | 287,713 | 2,181,851 | 1,379,430 | 9,909,106 | 0.6322 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 9 | Jul-06 | 219,091 | 2,400,942 | 1,506,396 | 11,415,502 | 0.6274 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 10 | Aug-06 | 212,242 | 2,613,184 | 2,311,807 | 13,727,309 | 0.8847 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 11 | Sep-06 | 316,488 | 2,929,672 | 1,529,894 | 15,257,203 | 0.5222 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 12 | Oct-06 | 235,847 | 3,165,519 | 1,559,947 | 16,817,150 | 0.4928 | NA | NA | NA | NA | NA | NA | NA | NA | ||
| 13 | Nov-06 | 588,683 | 3,754,202 | 4,460,306 | 21,277,456 | 1.1881 | 529,658 | 529,658 | 1,621,973 | 2,237,613 | 3.0623 | 219,907 | 219,907 | 262,427 | 445,289 | 1.1934 |
| 14 | Dec-06 | 1,329,061 | 5,083,263 | 4,784,284 | 26,061,740 | 0.9412 | 599,250 | 1,128,908 | 2,398,291 | 4,635,904 | 2.1244 | 526,746 | 746,653 | 1,071,693 | 1,516,982 | 1.4353 |
| 15 | Jan-07 | 265,584 | 5,348,847 | 2,020,382 | 28,082,122 | 0.3777 | 480,218 | 1,609,126 | 1,312,303 | 5,948,207 | 0.8155 | 224,153 | 970,806 | 588,349 | 2,105,331 | 0.6060 |
| 16 | Feb-07 | 268,860 | 5,617,707 | 2,118,513 | 30,200,635 | 0.3771 | 387,007 | 1,996,133 | 1,565,010 | 7,513,217 | 0.7840 | 147,681 | 1,118,487 | 502,431 | 2,607,762 | 0.4492 |
| 17 | Mar-07 | 246,480 | 5,864,187 | 2,636,882 | 32,837,517 | 0.4497 | 327,004 | 2,323,137 | 1,715,759 | 9,228,976 | 0.7386 | 161,751 | 1,280,238 | 976,514 | 3,584,276 | 0.7628 |
| 18 | Apr-07 | 189,225 | 6,053,412 | 1,547,828 | 34,385,345 | 0.2557 | 352,874 | 2,676,011 | 1,574,084 | 10,803,060 | 0.5882 | 94,432 | 1,374,670 | 494,435 | 4,078,711 | 0.3597 |
| 19 | May-07 | 207,829 | 6,261,241 | 2,248,008 | 36,633,353 | 0.3590 | 477,606 | 3,153,617 | 2,301,741 | 13,104,801 | 0.7299 | 98,567 | 1,473,237 | 696,909 | 4,775,620 | 0.4730 |
| 20 | Jun-07 | 271,070 | 6,532,311 | 1,977,421 | 38,610,774 | 0.3027 | 551,241 | 3,704,858 | 2,291,515 | 15,396,316 | 0.6185 | 113,453 | 1,586,690 | 507,291 | 5,282,911 | 0.3197 |
| 21 | Jul-07 | 169,514 | 6,701,825 | 1,960,847 | 40,571,621 | 0.2926 | 440,311 | 4,145,169 | 1,827,906 | 17,224,222 | 0.4410 | 172,212 | 1,758,902 | 895,306 | 6,178,217 | 0.5090 |
| 22 | Aug-07 | 386,526 | 7,088,351 | 3,359,087 | 43,930,708 | 0.4739 | 621,516 | 4,766,685 | 2,965,089 | 20,189,311 | 0.6220 | 195,039 | 1,953,941 | 1,331,976 | 7,510,193 | 0.6817 |
| 23 | Sep-07 | 480,772 | 7,569,123 | 5,153,582 | 49,084,290 | 0.6809 | 479,398 | 5,246,083 | 1,936,371 | 22,125,682 | 0.3691 | 123,711 | 2,077,652 | 919,597 | 8,429,790 | 0.4426 |
| 24 | Oct-07 | 585,966 | 8,155,089 | 3,998,849 | 53,083,139 | 0.4904 | 480,132 | 5,726,215 | 2,046,313 | 24,171,995 | 0.3574 | 127,206 | 2,204,858 | 946,954 | 9,376,744 | 0.4295 |
| 25 | Nov-07 | 994,037 | 9,149,126 | 11,349,681 | 64,432,820 | 1.2405 | 1,276,532 | 7,002,747 | 8,790,471 | 32,962,466 | 1.2553 | 563,158 | 2,768,016 | 3,638,372 | 13,015,116 | 1.3144 |
| 26 | Dec-07 | 1,184,729 | 10,333,855 | 9,606,763 | 74,039,583 | 0.9296 | 1,450,260 | 8,453,007 | 9,154,783 | 42,117,249 | 1.0830 | 705,498 | 3,473,514 | 3,676,583 | 16,691,699 | 1.0585 |
Items marked in red are adjusted monthly figures with respect to LT figures.
Items marked in green are ones showed LT sales > actual sales in the debut month of each console. Possibly due to preorders!
NOTES:
1. This is the formula I used for attach rate --> S.W sales for a month / LT sales for each console for that month.
2. If this is to be done more correctly, this would become a complex statistical problem.
3. FYI... all figures are taken from VG charts http://vgchartz.com/amonthly.php after going thru each month data.
4. I havent taken the bundled games into consideration.
