In FÖRBRYLLANDE (which, by the way, is the Swedish word for “puzzling”),
teams receive a furniture assembly manual in the style of IKEA
instructions where the pages have been shuffled (and, additionally,
where the IKEA IDEA man is clearly having a challenging
experience putting the furniture together). By using various context
clues in the pages, teams must re-assemble the manual in the correct
order. (For instance, the IDEA man initially forgets to place the parts
on a rug to prevent cracks, so steps without a rug must go before he
remembers and acquires a rug in later steps.)
Here is the manual once it has been assembled in the correct order:
Once assembled, the drawings of the IDEA man at the top of the page can be decoded using the Dancing Men cipher, which can also be found on the provided code sheet. (This is important as some letters — FJKQUWXZ — do not appear in the original Sherlock Holmes story.)
Decoding the dancing IDEA men in the now assembled manual yields the answer to the puzzle (and the piece of furniture you were trying to assemble): CABINET SECRETARY OF EUROPE