Last Week's Results:

SYSTEM PROJECTED    ACTUAL  DIFFERENCE  ABS DIF  ADJ % ACC
DS        30,500    29,839        661       661     97.78%
PSP      155,500   159,816     -4,316     4,316     97.30%
WII       34,000    26,024      7,976     7,976     69.35%
360        6,300     7,856     -1,556     1,556     80.19%
PS3        6,500     4,725      1,775     1,775     62.43%
TOTAL    232,800   228,260      4,540    16,284           
AVG                                       3,257     81.41%

Analysis:
I nailed the DS and PSP projections, hitting 97% accuracy on each, and was within 1800 units on both the 360 and PS3 projections.

The Wii was down further than expected, but a closer look at the chart on the right shows that it really is falling in line with YOY expectations.

What I'm seeing on a week-to-week basis is that the Adjusted YOY method works. The same things are happening at the same time and this method works for establishing predictability when markets are in a set pattern. That Wii 2008 line vs. the Wii 2007 line is breathtaking.

As it is now, my method is not set in stone and does not have a set equation, but is based on YOY data, current trends, and upcoming releases. I am attempting to establish an equation that can reasonably predict sales results within a huge +/- 5% error. My current method (sans equation) allows a +/- 3.2k unit difference, but a more disappointing accuracy percentage.

Last Week:
DS: 29,839
PSP: 159,816
WII: 26,024
360: 7,856
PS2: 7,261
PS3: 4,725

Average, Last 4 Weeks:
DS: 40,496
PSP: 58,858
WII: 25,136
360: 8,795
PS2: 8,177
PS3: 6,492

Last Year This Week:
DS: 76,273
PSP: 59,792
WII: 27,502
360: 3,718
PS3: 18,785

Projections 10/20 - 10/26:
DS: 30,000
PSP: 85,000
WII: 29,000
360: 7,500
PS3: 5,000

Notes, Ideas, Justifications, Expectations:
DS staying steady while DSi hype builds, PSP loses almost 50% of hardware bump after its first week, Wii mirrors 2007 exactly, 360 consistent for past 3 weeks, all confidence in PS3 lost--won't move past 5k until something changes.